%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ESYNOPSIS%26nbsp%3B%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AComment%20d%E9finir%20simplement%20un%20trou%20noir%26nbsp%3B%3F%20Quand%20a-t-on%20imagin%E9%20pour%20la%20premi%E8re%20fois%20leur%20existence%26nbsp%3B%3F%20Est-il%20vrai%20que%20les%20trous%20noirs%20ralentissent%20le%20temps%26nbsp%3B%3F%20Que%20se%20%0D%0A%0D%0Apasse-t-il%20%E0%20l%27int%E9rieur%26nbsp%3B%3F%20Pourrait-on%20voyager%20dans%20l%3Fespace%20en%20utilisant%20les%20trous%20de%20ver%26nbsp%3B%3F%20Un%20trou%20noir%20menace-t-il%20le%20syst%E8me%20solaire%26nbsp%3B%3F%20comment%20peut-on%20les%20%0D%0A%0D%0Aobserver%3F%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AConf%E9rence%20du%209%20septembre%202022%20au%20Patronage%20La%EFque%20Jules%20Vall%E8s%20%28Paris%2015e%29%20donn%E9e%20par%20Jean-Pierre%20Luminet%20%E0%20l%3Foccasion%20de%20la%20parution%20de%20son%20ouvrage%20%AB%26nbsp%3BLes%20trous%20noirs%20en%20100%20%0D%0A%0D%0Aquestions%26nbsp%3B%BB%20%28Tallandier%202022%29%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUne%20conf%E9rence%20passionnante%20et%20tr%E8s%20compl%E8te%2C%20par%20l%27un%20des%20plus%20grands%20vulgarisateurs%20et%20didacticiens%20sur%20le%20sujet.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%26nbsp%3B%21%3C%2Fp%3E
|
• |
Astrophysique et cosmologie : "Quelques questions sur les trous noirs" Par Jean-Pierre Luminet dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ESYNOPSIS%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ALe%2010%20avril%202019%2C%20des%20chercheurs%20d%E9voilaient%20la%20toute%20premi%E8re%20image%20d%92un%20trou%20noir%20supermassif.%20Une%20image%20%E0%20couper%20le%20souffle.%20Mais%20qui%20restait%20un%20peu%20floue.%20Pas%20de%20quoi%20en%20tirer%20des%20informations%20pr%E9cises.%20Pour%20cela%2C%20pr%E9viennent%20les%20astronomes%2C%20il%20faudra%20agrandir%20l%92Event%20Horizon%20Telescope.%20En%20construisant%20un%20radiot%E9lescope%20sur%20la%20Lune%20%21%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUne%20vid%E9o%20tr%E8s%20originale%2C%20pr%E9sentant%20graphiquement%20superbement%20comment%20se%20forme%20l%27aspect%20visuel%20des%20trous%20noirs.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%20%21%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20class%3D%22DKKeswick%22%20style%3D%22text-align%3A%20justify%3B%22%3ENota%20Bene%20%3A%20%3Cspan%20style%3D%22color%3Ared%3B%22%3Ecette%20vid%E9o%20poss%E8de%20un%20flux%20Full%20HD%20%281920x1080%29%2C%20alors%20pensez%20%E0%20mettre%20le%20lecteur%20en%20plein%20%E9cran%20pour%20en%20profiter%20pleinement%3C%2Fspan%3E.%3C%2Fp%3E
|
• |
Astrophysique et relativité générale : Dans les secrets des trous noirs grâce à un radiotélescope sur la Lune dans la catégorie "Science & Technologie" |
%3Cp%20class%3D%22news%22%20style%3D%22text-align%3A%20center%3B%22%3E%3Cimg%20alt%3D%22%22%20src%3D%22IMAGES%2Fau_coeur_des_trous_noirs_aurelien_barrau.jpg%22%20style%3D%22border-width%3A%201px%3B%20border-style%3A%20solid%3B%20width%3A%20400px%3B%20height%3A%20615px%3B%22%3E%26nbsp%3B%3Cimg%20alt%3D%22%22%20src%3D%22IMAGES%2FTrous-noirs-et-%E9toiles-en-rebond_aurelien_barrau.jpg%22%20style%3D%22border-width%3A%201px%3B%20border-style%3A%20solid%3B%20width%3A%20400px%3B%20height%3A%20615px%3B%22%3E%26nbsp%3B%3Cimg%20alt%3D%22%22%20src%3D%22IMAGES%2FTrous-noirs-et-espace_temps_aurelien_barrau.jpg%22%20style%3D%22border-width%3A%201px%3B%20border-style%3A%20solid%3B%20width%3A%20400px%3B%20height%3A%20615px%3B%22%3E%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22news%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%0D%0A%3Ctable%20align%3D%22center%22%20border%3D%220%22%20cellpadding%3D%224%22%20cellspacing%3D%220%22%20style%3D%22width%3A%2080%25%3B%22%3E%0D%0A%09%3Ctbody%3E%0D%0A%09%09%3Ctr%3E%0D%0A%09%09%09%3Ctd%20valign%3D%22top%22%20width%3D%2270%22%3E%3Cimg%20border%3D%220%22%20height%3D%2264%22%20src%3D%22IMAGES%2FQUOTE.png%22%20width%3D%2264%22%3E%3C%2Ftd%3E%0D%0A%09%09%09%3Ctd%3E%0D%0A%09%09%09%3Cp%20align%3D%22justify%22%20class%3D%22news%22%20style%3D%22line-height%3A180%25%22%3E%3Ci%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ELes%20trous%20noirs%20sont%20des%20objets%20fascinants.%20Nous%20sommes%20aujourd%27hui%20pratiquement%20certains%20qu%27ils%20existent%20et%20qu%27il%20y%20en%20a%20des%20centaines%20de%20millions%20dans%20notre%20Galaxie%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fi%3E%3C%2Fp%3E%0D%0A%09%09%09%3C%2Ftd%3E%0D%0A%09%09%09%3Ctd%20valign%3D%22bottom%22%20width%3D%2270%22%3E%3Cimg%20border%3D%220%22%20height%3D%2264%22%20src%3D%22IMAGES%2FUNQUOTE.png%22%20width%3D%2264%22%3E%3C%2Ftd%3E%0D%0A%09%09%3C%2Ftr%3E%0D%0A%09%09%3Ctr%3E%0D%0A%09%09%09%3Ctd%20align%3D%22center%22%20colspan%3D%223%22%20valign%3D%22top%22%3E%3Cspan%20style%3D%22font-size%3A18px%3B%22%3E%3Cspan%20style%3D%22font-family%3AArial%2CHelvetica%2Csans-serif%3B%22%3E%3Cstrong%3EAur%E9lien%26nbsp%3BBarrau.%3C%2Fstrong%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Ftd%3E%0D%0A%09%09%3C%2Ftr%3E%0D%0A%09%3C%2Ftbody%3E%0D%0A%3C%2Ftable%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%20style%3D%22text-align%3A%20justify%3B%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ELe%20mot%20de%20l%27%E9diteur%20sur%20%22Au%20coeur%20des%20trous%20noirs%22%26nbsp%3B%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AQue%20sait-on%20des%20trous%20noirs%20%3F%20Peut-on%20les%20observer%20%3F%20Qu%27y%20a-t-il%20%E0%20l%27int%E9rieur%20%3F%20Existent-ils%20vraiment%20%3F%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ALes%20%26nbsp%3Btrous%20noirs%20%26nbsp%3Bsont%20des%20astres%20fascinants%2C%20des%20sph%E8res%20dans%20l%27espace%20dont%20rien%20ne%20peut%20s%27%E9chapper.%20De%20tels%20objets%20ne%20peuvent%20ni%20%E9mettre%2C%20ni%20r%E9fl%E9chir%20la%20lumi%E8re%2C%20mais%20certains%20sont%20pourtant%20extraordinairement%20lumineux.%20%26nbsp%3BToutefois%2C%20ce%20n%27est%20pas%20l%E0%20leur%20seule%20bizarrerie%20%3A%20dans%20un%20trou%20noir%2C%20l%27espace%20se%20change%20en%20temps%2C%20le%20temps%20en%20espace%2C%20et%20nul%20ne%20conna%EEt%20la%20v%E9ritable%20nature%20de%20la%20singularit%E9%20centrale.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%20style%3D%22text-align%3A%20justify%3B%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ELe%20mot%20de%20l%27%E9diteur%20sur%20%22Trous%20noirs%20et%20%E9toiles%20en%20rebond%22%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AAur%E9lien%20Barrau%20est%20astrophysicien%20et%26nbsp%3Bchercheur%20au%20CNRS%20de%20Grenoble.%20Il%20est%26nbsp%3Bsp%E9cialis%E9%20dans%20la%20physique%20des%20multivers%20et%20des%20trous%20noirs.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ALes%20trous%20noirs%20sont%26nbsp%3B%20des%20objets%20fascinants.%20Nous%20sommes%20aujourd%92hui%20pratiquement%20certains%20qu%92ils%20existent%20et%20qu%92il%20y%20en%20a%20des%20centaines%20de%20millions%20dans%20notre%20Galaxie.%20L%92espace%20et%20le%20temps%20y%20sont%20tr%E8s%20diff%E9rents%20de%20ce%20que%20nous%20connaissons%2C%20ils%20peuvent%20m%EAme%20se%20changer%20l%92un%20en%20l%92autre%20%21%20Je%20montrerai%20comment%20les%20trous%20noirs%20se%20forment%20et%20les%20ph%E9nom%E8nes%20%E9tranges%20qui%20se%20passent%20autour%20d%92eux%20et%20en%20eux.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AMais%20beaucoup%20de%20questions%20se%20posent%20encore%20et%20de%20nouvelles%20id%E9es%20un%20peu%20folles%20%E9mergent.%20Nous%20verrons%20comment%20les%20th%E9ories%20r%E9centes%20conduisent%20%E0%20un%20incroyable%20sc%E9nario%20d%92%E9toiles%20en%20rebond%20qui%20constituerait%20une%20sorte%20d%92acc%E9l%E9rateur%20vers%20le%20futur.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%20style%3D%22text-align%3A%20justify%3B%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ELa%20quatri%E8me%20de%20couverture%20de%20%22Trous%20noirs%20et%20espace-temps%22%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ALes%20trous%20noirs%20sont%20des%20objets%20fascinants.%20Nous%20sommes%20aujourd%27hui%20pratiquement%20certains%20qu%27ils%20existent%20et%20qu%27il%20y%20en%20a%20des%20centaines%20de%20millions%20dans%20notre%20galaxie.%20L%27espace%20et%20le%20temps%20y%20sont%20tr%E8s%20diff%E9rents%20de%20ce%20que%20nous%20connaissons%2C%20ils%20peuvent%20m%EAme%20se%20changer%20l%27un%20en%20l%27autre%26nbsp%3B%21%20Comment%20les%20trous%20noirs%20se%20forment-ils%20et%20quels%20sont%20les%20ph%E9nom%E8nes%20%E9tranges%20qui%20se%20passent%20autour%20d%27eux%20et%20en%20eux%26nbsp%3B%3F%20De%20nombreuses%20questions%20se%20posent%20encore%20et%20de%20nouvelles%20id%E9es%20un%20peu%20folles%20%E9mergent.%20Aur%E9lien%20Barrau%20%E9voque%20les%20th%E9ories%20r%E9centes%20qui%20conduisent%20%E0%20un%20incroyable%20sc%E9nario%20d%27%E9toiles%20en%20rebond%20et%20d%27acc%E9l%E9rateur%20vers%20le%20futur.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EDeux%20experts%20de%20la%20relativit%E9%20nous%20%3Cfont%20color%3D%22%23FF0000%22%20face%3D%22arial%22%20size%3D%225%22%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFFCC%22%3E%3Cb%3E%20%5B...%5D%3C%2Fb%3E%3C%2Fspan%3E%3C%2Ffont%3E
|
• |
Astrophysique, espace-temps, relativité, et cosmologie : Étienne Klein reçoit Aurélien Barrau sur le mystère des trous noirs lors de son émission "La conversation scientifique" sur France Culture dans la catégorie "Science & Technologie" |
%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ESYNOPSIS%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ADot%E9s%20d%27une%20%E9nergie%20ph%E9nom%E9nale%2C%20les%20trous%20noirs%20font%20partie%20des%20entit%E9s%20cosmiques%20les%20plus%20%E9nigmatiques.%20Un%20spectaculaire%20voyage%20%E0%20la%20d%E9couverte%20de%20ces%20monstres%20voraces%20qui%20engloutissent%20tout%20sur%20leur%20passage.%20Second%20volet%20%3A%20%E0%20la%20fin%20des%20ann%E9es%201950%2C%20les%20t%E9lescopes%20rel%E8vent%20la%20pr%E9sence%20de%20myst%E9rieux%20points%20chauds%20%E9mettant%20un%20rayonnement%20radio%2C%20les%20quasars...%3Cbr%3E%0D%0A%3Cbr%3E%0D%0APeu%20%E0%20peu%2C%20les%20sp%E9cialistes%20d%E9couvrent%20que%20les%20trous%20noirs%20sont%20bien%20plus%20nombreux%20qu%27ils%20ne%20le%20pensaient%20et%20qu%27ils%20d%E9vorent%20notre%20Univers.%20%C0%20la%20fin%20des%20ann%E9es%201950%2C%20les%20t%E9lescopes%20rel%E8vent%20la%20pr%E9sence%20de%20myst%E9rieux%20points%20chauds%20%E9mettant%20un%20rayonnement%20radio%20%3A%20les%20quasars.%20Les%20entit%E9s%20les%20plus%20lumineuses%20de%20l%3FUnivers%20sont%20en%20fait%20des%20r%E9gions%20compactes%20qui%20entourent%20des%20trous%20noirs%20supermassifs.%20L%27un%20d%27eux%20est%20d%E9tect%E9%20au%20beau%20milieu%20de%20notre%20Voie%20lact%E9e%3F%3Cbr%3E%0D%0A%3Cbr%3E%0D%0A%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3E%C9clairages%26nbsp%3B%3C%2Fspan%3E%3Cbr%3E%0D%0ADans%20ce%20passionnant%20documentaire%2C%20Rushmore%20DeNooyer%20%28La%20bombe%29%20nous%20entra%EEne%20%E0%20la%20rencontre%20d%27astronomes%20et%20de%20physiciens%2C%20parmi%20lesquels%20de%20nombreuses%20femmes%2C%20en%20pointe%20dans%20la%20recherche%20et%20les%20derni%E8res%20technologies%20d%27observation%20du%20cosmos.%20Pilot%E9%20par%20l%3Fastrophysicienne%20Janna%20Levin%20et%20enrichi%20d%27images%20spectaculaires%2C%20un%20%E9clairage%20captivant%20sur%20l%27origine%20des%20trous%20noirs%2C%20leur%20composition%20et%20leur%20fonctionnement%2C%20mais%20%E9galement%20sur%20ce%20que%20leur%20%E9tude%20peut%20nous%20apprendre%20sur%20la%20nature%20de%20l%3Fespace%2C%20du%20temps%20et%20de%20la%20gravit%E9.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUn%20second%20%E9pisode%20passionnant%20%21%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%201%3A19%2C%20la%20narratrice%20d%E9clare%20%3A%20%22%3Cspan%20style%3D%22color%3A%23ff0000%3B%22%3E%3Cem%3EPlus%20stup%E9fiant%20encore%2C%20ils%20sont%20plus%20massifs%2C%20et%20plus%20nombreux%20qu%27on%20ne%20l%27imaginait%3C%2Fem%3E%3C%2Fspan%3E%22.%20Mort%20de%20rire%20%21%26nbsp%3B%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FICONES%2FIcone%2520-%2520LOL.gif%22%3E%26nbsp%3B%C7a%20fait%20des%20ann%E9es%20que%20je%20le%20dit%26nbsp%3B%21%20Franchement%2C%20mais%20quelle%20bande%20de%20buses...%20Parmi%20les%20scientifiques%2C%20il%20y%26nbsp%3Ba%20manifestement%26nbsp%3Bbeaucoup%20de%20gens%20%E0%20la%20conscience%20endormie%20qui%20sont%20inaptes%20%E0%20faire%20de%20la%20science.%20Ils%20sont%20entra%EEn%E9s%20%E0%20r%E9soudre%20des%20%E9quations%20complexes%2C%20certes%2C%20mais%20ils%20ont%20h%E9las%20le%20discernement%20atrophi%E9%2C%20c%27est%20terrible.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUn%20excellent%20document%20qui%20nous%20r%E9gale.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Astrophysique, cosmologie, gravitation, et relativité : "Mystérieux trous noirs #2 : comment les détecter ?" ("Les ogres du cosmos") : dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ESYNOPSIS%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ADot%E9s%20d%27une%20%E9nergie%20ph%E9nom%E9nale%2C%20les%20trous%20noirs%20font%20partie%20des%20entit%E9s%20cosmiques%20les%20plus%20%E9nigmatiques.%20Un%20spectaculaire%20voyage%20%E0%20la%20d%E9couverte%20de%20ces%20monstres%20voraces%20qui%20engloutissent%20tout%20sur%20leur%20passage.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ADe%20tous%20les%20ph%E9nom%E8nes%20cosmiques%2C%20les%20trous%20noirs%20sont%20les%20plus%20fascinants.%20Engins%20de%20destruction%20apocalyptiques%2C%20ils%20font%20dispara%EEtre%20tout%20ce%20qui%20passe%20%E0%20leur%20port%E9e%20%3A%20particules%2C%20poussi%E8res%2C%20gaz%2C%20plan%E8tes%20et%20m%EAme%20%E9toiles%20g%E9antes%20%21%20La%20science%20dispose%20aujourd%27hui%20de%20pr%E9cieuses%20donn%E9es%20pour%20mieux%20appr%E9hender%20ces%20entit%E9s%20pr%E9sentes%20dans%20chaque%20galaxie%2C%20y%20compris%20la%20n%F4tre.%20Le%2011%20f%E9vrier%202016%2C%20l%27annonce%20de%20la%20d%E9tection%20de%20la%20collision%2C%20il%20y%20a%20un%20milliard%20d%3Fann%E9es%2C%20entre%20deux%20trous%20noirs%20et%20la%20d%E9couverte%20des%20ondes%20gravitationnelles%20qui%20a%20d%E9coul%E9%20de%20cet%20%E9v%E9nement%20ont%20fondamentalement%20chang%E9%20la%20compr%E9hension%20que%20nous%20avions%20de%20la%20formation%20de%20l%27Univers.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0A%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3E%C9clairages%26nbsp%3B%3C%2Fspan%3E%3Cbr%3E%0D%0ADans%20ce%20passionnant%20documentaire%2C%20Rushmore%20DeNooyer%20%28La%20bombe%29%20nous%20entra%EEne%20%E0%20la%20rencontre%20d%27astronomes%20et%20de%20physiciens%2C%20parmi%20lesquels%20de%20nombreuses%20femmes%2C%20en%20pointe%20dans%20la%20recherche%20et%20les%20derni%E8res%20technologies%20d%27observation%20du%20cosmos.%20Pilot%E9%20par%20l%3Fastrophysicienne%20Janna%20Levin%20et%20enrichi%20d%27images%20spectaculaires%2C%20un%20%E9clairage%20captivant%20sur%20l%27origine%20des%20trous%20noirs%2C%20leur%20composition%20et%20leur%20fonctionnement%2C%20mais%20%E9galement%20sur%20ce%20que%20leur%20%E9tude%20peut%20nous%20apprendre%20sur%20la%20nature%20de%20l%3Fespace%2C%20du%20temps%20et%20de%20la%20gravit%E9.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ADocumentaire%20de%20Rushmore%20DeNooyer%20%28Etats-Unis%2C%202017%2C%2053mn%29%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUn%20excellent%20documentaire%20de%20vulgarisation.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Astrophysique, gravitation, relativité, et cosmologie : "Mystérieux trous noirs #1 : comment se forment-ils ?" ("Anatomie d'un trou noir") : dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22chalk%22%3E%3Cspan%20style%3D%22color%3A%23ffff66%3B%22%3ESYNOPSIS%20%3A%3C%2Fspan%3E%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AConf%E9rence%20de%20l%27astrophysicien%20Aur%E9lien%20Barrau%20lors%20de%20la%2011e%20%E9dition%20des%20Rencontres%20du%20ciel%20et%20de%20l%27espace%2C%20le%202%20novembre%2C%20%E0%20la%20Cit%E9%20des%20sciences%20et%20de%20l%27industrie.%20La%20th%E9orie%20d%3FEinstein%20est%20magnifique%20et%20remarquable%20mais%20elle%20n%3Fest%20pas%20%AB%20compl%E8te%20%BB.%20Il%20faut%20aller%20au-del%E0%20pour%20prendre%20en%20compte%20la%20physique%20quantique.%20Je%20pr%E9senterai%20les%20id%E9es%20g%E9n%E9rales%20de%20la%20gravitation%20quantique%20et%20l%3Fimage%20r%E9volutionnaire%20%E0%20laquelle%20elle%20m%E8ne%20quand%20on%20l%3Fapplique%20aux%20trous%20noirs%20et%20au%20Big%20Bang.%20Nous%20%E9tudierons%20la%20nouvelle%20image%20du%20monde%20qui%20se%20dessine%20et%20interrogerons%20sa%20l%E9gitimit%E9%20et%20sa%20cr%E9dibilit%E9.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EEn%20dehors%20de%20l%27introduction%20et%20de%20la%20fin%2C%20merdiquement%20po%E9tiques%20et%20totalement%20inutiles%2C%20une%20excellente%20conf%E9rence.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3ESeule%20question%20que%20je%20me%20pose%2C%20hormis%20la%20singularit%E9%26nbsp%3Bn%27existe%20pas%2C%20c%27est%20un%20astre%26nbsp%3B%3A%20je%20doute%20que%20le%20passage%20de%20l%27horizon%20des%20%E9v%E9nements%26nbsp%3Bsoit%20imperceptible%20dans%20la%20mesure%20o%F9%20c%27est%20l%27endroit%20o%F9%20l%27espace-temps%20est%20referm%E9%20sur%20lui-m%EAme.%20Un%20voyageur%20doit%20%EAtre%20coup%E9%20en%20deux%20contin%FBment%20au%20fur%20et%20%E0%20mesure%20qu%27il%20passe%20cette%20fronti%E8re%20car%20une%20partie%20de%20lui-m%EAme%20est%20dans%20l%27Univers%2C%20et%20l%27autre%20dans%20le%20trou%20noir.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Astronomie, astrophysique, espace-temps, et relativité : "Trous noirs et gravitation quantique" par Aurélien Barrau dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E66%20milliards%20de%20masse%20solaires%20pour%20TON%20618...%20Une%20belle%20b%EAte...%26nbsp%3B%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FICONES%2FIcone%2520-%2520Choqu%25E9.gif%22%3E%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUne%20vid%E9o%20moins%20impressionnante%20que%26nbsp%3B%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3FNumVideo%3D8465%22%20target%3D%22_blank%22%3E%5Bcelle-ci%5D%3C%2Fa%3E%20%28%3Cimg%20align%3D%22absmiddle%22%20border%3D%220%22%20height%3D%2225%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.gif%22%20width%3D%2225%22%3E%29%2C%20mais%20quand%20m%EAme...%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3ENota%20Bene%20%3A%20la%20liste%20des%20trous%20noirs%20les%20plus%20massifs%20est%20disponible%20sur%20la%20page%20anglaise%20de%20Wikip%E9dia%2C%26nbsp%3B%3Ca%20href%3D%22https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FList_of_most_massive_black_holes%22%20target%3D%22_blank%22%3E%5Bici%5D%3C%2Fa%3E%20%28%3Cimg%20align%3D%22absmiddle%22%20border%3D%220%22%20height%3D%2225%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.gif%22%20width%3D%2225%22%3E%29%20%28La%20page%20fran%E7aise%20n%27est%20pas%20tenue%20%E0%20jour%29.%3C%2Fp%3E
|
• |
Astronomie et astrophysique : une comparaison de la taille des trous noirs au début 2018 : dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EPensez%20%E0%20activer%20les%20sous-tites.%3Cbr%3E%3Cbr%3ELes%20trous%20noirs%20supermassifs%20sont%20effrayants.%20Certain%20ont%20une%20taille%20faisant%20plusieurs%20fois%20la%20taille%20de%20tout%20le%20syst%E8me%20solaire...%20Ce%20sont%20de%20v%E9ritables%20monstres.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EEn%20plus%20impressionnant%2C%26nbsp%3Bvoyez%20cette%20%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3FNumVideo%3D8465%22%20target%3D%22_blank%22%3E%5Bvid%E9o%5D%3C%2Fa%3E%20%28%3Cimg%20align%3D%22absmiddle%22%20border%3D%220%22%20height%3D%2225%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.gif%22%20width%3D%2225%22%3E%29.%3C%2Fp%3E
|
• |
Astrophysique : "La terrifiante échelle des trous noirs" dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3EUne%20synth%E8se%20passionnante.%3C%2Fp%3E%0D%0A%0D%0A%3Cp%20align%3D%22justify%22%20class%3D%22DKKeswick%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Astrophysique, relativité, et cosmologie : "La Méthode scientifique - Les Trous noirs" avec Alain Riazuelo et Éric Gourgoulhon France Culture - 21 Février 2017 dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Fligo-fusion-trou-noir-ligo.jpg%22%20width%3D%22720%22%20height%3D%22450%22%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EConf%E9rence%20donn%E9e%20lors%20des%20Rencontres%20du%20Ciel%20et%20de%20%0D%0A%09l%27espace%202016.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EIl%20y%20a%20cent%20ans%2C%20Albert%20Einstein%20montrait%20que%20la%20mati%E8re%20%0D%0A%09d%E9forme%20l%27espace%20et%20le%20temps%20et%20de%20cette%20d%E9formation%20nait%20la%20gravit%E9.%20La%20%0D%0A%09mati%E8re%20en%20mouvement%20donne%20naissance%20%E0%20des%20ondes%20d%27espace%20et%20de%20temps%2C%20les%20%0D%0A%09ondes%20gravitationnelles%2C%20qui%20se%20propagent%20sur%20de%20grandes%20distances.%20Ce%20sont%20%0D%0A%09ces%20ondes%20que%20les%20deux%20d%E9tecteurs%20am%E9ricains%20du%20Laser%20Interferometer%20%0D%0A%09Gravitational-wave%20Observatory%20%28LIGO%29%20ont%20observ%E9%20pour%20la%20premi%E8re%20fois%20en%20%0D%0A%09septembre%20dernier.%20La%20premi%E8re%20onde%20re%E7ue%20par%20LIGO%2C%20ainsi%20que%20les%20autres%20%0D%0A%09observ%E9es%20depuis%2C%20proviennent%20de%20la%20fusion%20de%20deux%20trous%20noirs%20situ%E9s%20%E0%20des%20%0D%0A%09milliards%20d%27ann%E9es-lumi%E8re%20de%20la%20Terre.%20Avec%20cette%20d%E9couverte%2C%20s%27ouvre%20une%20%0D%0A%09nouvelle%20fen%EAtre%20d%27observation%20de%20l%27Univers%20donnant%20notamment%20acc%E8s%20%E0%20des%20%0D%0A%09objets%20astrophysiques%20obscurs%2C%20qui%20%E9mettent%20peu%20ou%20pas%20de%20lumi%E8re.%20%0D%0A%09L%27astronomie%20gravitationnelle%20se%20d%E9veloppera%20dans%20les%20prochaines%20ann%E9es%20%0D%0A%09gr%E2ce%20%E0%20un%20r%E9seau%20international%20d%27observatoires%2C%20dont%20le%20d%E9tecteur%20%0D%0A%09franco-italien%20Virgo.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ELa%20pr%E9sentation%20donne%20une%20vue%20d%27ensemble%20de%20ce%20domaine%20%0D%0A%09scientifique%20en%20plein%20essor.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20excellente%20conf%E9rence%20o%F9%20l%27on%20apprend%20plein%20de%20choses%20sur%20%0D%0Ales%20ondes%20gravitationnelles%20et%20la%20nouvelle%20astronomie%20qui%20est%20en%20train%20de%20voir%20%0D%0Ale%20jour.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EPassionnant%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20seul%20b%E9mol%2C%20le%20conf%E9rencier%20n%27arr%EAte%20pas%20de%20%0D%0Adire%20%E0%20tout%20bout%20de%20champ%20%26quot%3B%3Ci%3Ed%27accord%20%3F%3C%2Fi%3E%26quot%3B%2C%20ce%20qui%20est%20totalement%20inutile%20et%20%0D%0Aun%20peu%20aga%E7ant%20%E0%20la%20longue.%3C%2Fb%3E%3C%2Fp%3E
|
• |
Astrophysique, pulsars, trous noirs, et ondes gravitationnelles : "L'astronomie gravitationnelle à l'écoute du côté obscur de l'Univers" par Éric Chassande-Mottin - Novembre 2016 dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2Ftrou%2520noir%2520geant.jpg%22%20width%3D%22800%22%20height%3D%22579%22%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20une%20r%E9alisation%20amateur%20permettant%20de%20%0D%0Acomprendre%20d%27une%20mani%E8re%20graphique%20les%20%E9chelles%20de%20tailles%20et%20de%20masses%20qui%20%0D%0Adiff%E9rencient%20les%20diff%E9rents%20types%20de%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3EQu%27est-ce%20qu%27un%20trou%20noir%20stellaire%20%3F%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EUn%20trou%20noir%20stellaire%20r%E9sulte%20de%20l%27effondrement%20d%27une%20%0D%0A%09%E9toile%20massive%20sur%20elle-m%EAme.%20Cet%20effondrement%20se%20manifeste%20directement%20par%20%0D%0A%09l%27apparition%20d%27une%20supernova%2C%20possiblement%20associ%E9e%20%E0%20un%20sursaut%20gamma.%20Un%20%0D%0A%09tel%20trou%20noir%20a%20une%20masse%20comprise%20entre%20trois%20et%20cinq%20masses%20solaires%20au%20%0D%0A%09minimum%2C%20le%20plus%20massif%20connu%20%28en%202001%29%20ayant%20une%20masse%20de%2014%20masses%20%0D%0A%09solaires.%20Les%20principaux%20prog%E9niteurs%20de%20trous%20noirs%20stellaires%20par%20%0D%0A%09effondrement%20sont%20les%20%E9toiles%20Wolf-Rayet.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3EQu%27est-ce%20qu%27un%20trou%20noir%20de%20taille%20%0D%0Ainterm%E9diaire%20%3F%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EEn%20astrophysique%2C%20un%20trou%20noir%20interm%E9diaire%20d%E9signe%20un%20%0D%0A%09trou%20noir%20de%20quelques%20milliers%20de%20masses%20solaires%2C%20c%27est-%E0-dire%20avec%20une%20%0D%0A%09masse%20se%20situant%20entre%20celle%20des%20trous%20noirs%20stellaires%20et%20les%20trous%20noirs%20%0D%0A%09supermassifs.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3EQu%27est-ce%20qu%27un%20trou%20noir%20supermassif%20%3F%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EUn%20trou%20noir%20supermassif%20%28en%20abr%E9g%E9%20TNSM1%2C2%2C3%294%20est%20un%20%0D%0A%09trou%20noir%20dont%20la%20masse%20est%20de%20l%27ordre%20d%27un%20million%20de%20masse%20solaire%20ou%20%0D%0A%09plus.%20Plusieurs%20type%20de%20trous%20noirs%20existent%20%3A%20les%20trous%20noirs%20primordiaux%2C%20%0D%0A%09les%20trous%20noirs%20stellaires%2C%20les%20trous%20noirs%20interm%E9diaires%20et%20les%20trous%20%0D%0A%09noirs%20supermassifs.%20Ces%20derniers%20sont%20les%20plus%20massifs%20et%20leur%20masse%20peut%20%0D%0A%09atteindre%20jusqu%27%E0%2021%20milliards%20de%20masse%20solaire%20%28celui%20de%20la%20galaxie%20NGC%20%0D%0A%094889%29.%20Les%20trous%20noirs%20supermassifs%20se%20trouvent%20au%20centre%20des%20galaxies%20%0D%0A%09massives%20et%20il%20est%20g%E9n%E9ralement%20accept%E9%20dans%20la%20communaut%E9%20scientifique%20que%20%0D%0A%09chaque%20grosse%20galaxie%20arbore%20de%20tels%20objets.%20Le%20trou%20noir%20supermassif%20au%20%0D%0A%09centre%20de%20notre%20galaxie%2C%20la%20Voie%20Lact%E9e%2C%20correspond%20%E0%20la%20source%20Sagittarius%20%0D%0A%09A%2A.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20vid%E9o%20splendide%2C%20unique%2C%20tr%E8s%20bien%20r%E9alis%E9e%2C%20tant%20du%20%0D%0Apoint%20de%20vue%20graphique%20que%20sonore%2C%20un%20petit%20must%20dans%20son%20genre.%20Vous%20allez%20vous%20%0D%0Ar%E9galer.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20absolument%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cul%3E%0D%0A%09%3Cli%3E%0D%0A%09%3Cb%3EBien%20que%20pr%E9sent%E9e%20au%20format%20HD%20%281280x720%29%2C%20cette%20%0D%0A%09vid%E9o%20poss%E8de%20un%20flux%20Full%20HD%20%281920x1080%29.%20Alors%20pensez%20%E0%20mettre%20la%20vid%E9o%20en%20%0D%0A%09plein%20%E9cran.%3C%2Fb%3E%3C%2Fli%3E%0D%0A%09%3Cli%3E%0D%0A%09%3Cb%3EPour%20une%20liste%20des%20trous%20noirs%20les%20plus%20massifs%20%0D%0A%09actuellement%20connus%2C%20voyez%20%0D%0A%09cette%20%3Ca%20target%3D%22_blank%22%20href%3D%22https%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FListe_des_trous_noirs_les_plus_massifs%22%3E%20%0D%0A%09%5Bpage%5D%3C%2Fa%3E%20%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%3C%2Fb%3E%3C%2Fli%3E%0D%0A%3C%2Ful%3E
Must
|
• |
Astrophysique étonnante et relativité : une magnifique comparaison des différentes tailles de trous noirs dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Fgravitational_waves_black_holes.jpg%22%20width%3D%22900%22%20height%3D%22505%22%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EGW150914%2C%20un%20nom%20cryptique%20qui%20est%20d%E9j%E0%20devenu%20c%E9l%E8bre.%20%0D%0A%09La%20premi%E8re%20observation%20d%27une%20onde%20gravitationnelle%20dans%20un%20d%E9tecteur%20%0D%0A%09terrestre%2C%20la%20premi%E8re%20confirmation%20de%20l%27existence%20de%20couples%20de%20trous%20%0D%0A%09noirs%2C%20le%20premier%20test%20direct%20de%20la%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale%20en%20%0D%0A%09champ%20fort.%20Qu%27est-ce%20que%20la%20relativit%E9%20g%E9n%E9rale%20et%20la%20courbure%20de%20%0D%0A%09l%27espace-temps%20%3F%20Comment%20sait-on%20qu%27on%20a%20vu%20des%20trous%20noirs%20respectivement%20%0D%0A%09de%2029%20et%2036%20fois%20la%20masse%20du%20soleil%20%3F%20Attend-on%20une%20contrepartie%20optique%20%3F%20%0D%0A%09Et%20apr%E8s%20%3F%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EDamir%20Buskulic%20est%20membre%20de%20la%20collaboration%20Virgo%20%0D%0A%09depuis%201998%2C%20professeur%20%E0%20l%27Universit%E9%20Savoie%20Mont-Blanc%20et%20membre%20du%20%0D%0A%09Laboratoire%20d%27Annecy-le-Vieux%20de%20Physique%20des%20Particules%20%28LAPP%29.%20Il%20a%20%0D%0A%09commenc%E9%20sa%20carri%E8re%20scientifique%20de%201990%20%E0%201998%20dans%20la%20collaboration%20Aleph%20%0D%0A%09qui%20faisait%20fonctionner%20le%20d%E9tecteur%20du%20m%EAme%20nom%20sur%20l%27acc%E9l%E9rateur%20LEP%20%0D%0A%09%28CERN%29.%20Il%20a%20ensuite%20rejoint%20la%20collaboration%20Virgo%20qui%20a%20construit%20un%20%0D%0A%09d%E9tecteur%20interf%E9rom%E9trique%20d%27ondes%20gravitationnelles%2C%20o%F9%20il%20a%20travaill%E9%20%0D%0A%09principalement%20sur%20les%20aspects%20d%27analyse%20rapide%20des%20signaux%20de%20coalescence%20%0D%0A%09de%20couples%20d%27%E9toiles%20%E0%20neutrons.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20conf%E9rence%20v%E9ritablement%20accessible%20%E0%20tous%2C%20pour%20%0D%0Acomprendre%20les%20ondes%20gravitationnelles%2C%20leur%20r%E9cente%20d%E9couverte%2C%20les%20trous%20%0D%0Anoirs%2C%20etc.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20conf%E9rence%20passionnante%20et%20tr%E8s%20p%E9dagogique.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Ondes gravitationnelles :"Signaux gravitationnels de trous noirs, on les a entendu !", une conférence grand public de Damir Buskulic dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cvideo%20src%3D%22VIDEOS%2F8150-0_trou%20noir%20gargantua.mp4%22%20autoplay%20loop%20muted%20preload%3D%22auto%22%20poster%3D%22IMAGES%2Ffond_blanc_720x404.jpg%22%3E%3C%2Fvideo%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20une%20capsule%20de%20la%20s%E9rie%20%26quot%3BScience%20%E9tonnante%26quot%3B%20%0D%0Ar%E9alis%E9e%20par%20un%20amateur%2C%20et%20portant%20sur%20dans%20cet%20%E9pisode%20sur%20les%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20excellente%20vid%E9o%2C%20bien%20p%E9dagogique%2C%20pour%20que%20monsieur%20%0D%0Atout%20le%20monde%20puisse%20s%27initier%20aux%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
"Science étonnante - Les trous noirs" dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2FLHC%2520disparait%2520en%2520trou%2520noir.jpg%22%20width%3D%22580%22%20height%3D%22392%22%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20un%20extrait%20d%27un%20documentaire%20sur%20les%20trous%20%0D%0Anoirs%2C%20expliquant%20comment%20le%20grand%20collisionneur%20de%20hadrons%20du%20CERN%20%28le%20LHC%29%20%0D%0Aengendre%20des%20mini%20trous%20noirs%20gr%E2ce%20aux%20%E9nergies%20fabuleuses%20qu%27il%20est%20capable%20%0D%0Ad%27atteindre.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2Fmini%2520et%2520micro%2520trou%2520noir.jpg%22%20width%3D%22800%22%20height%3D%22627%22%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECe%20documentaire%2C%20et%20les%20scientifiques%2C%20affirment%20qu%27il%20n%27y%20%0D%0Aaurait%20aucun%20danger%2C%20mais%20je%20trouve%20que%20c%27est%20bien%20pr%E9somptueux...%20Lorsque%20la%20%0D%0Ascience%20%E9tudie%20des%20domaines%20inconnus%2C%20elle%20peut%20parfois%20tomber%20sur%20de%20nouveaux%20%0D%0Aph%E9nom%E8nes%20totalement%20inattendus%20et%20dangereux%2C%20comme%20par%20exemple%20les%20rayons%20X%2C%20la%20radioactivit%E9%2C%20etc.%2C%20%0D%0Aph%E9nom%E8nes%20qu%27on%20%0D%0Ane%20voit%20pas%20au%20d%E9but%20%28ils%20sont%20invisibles%20pour%20nos%20yeux%29%2C%20et%20qui%20pourtant%20qui%20%0D%0Asont%20hautement%20d%E9l%E9t%E8res.%20%0D%0A%3Cb%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFF00%22%3ELa%20fin%20de%20vie%20de%20Marie%20%0D%0ACurie%20en%20est%20tout%20%E0%20fait%20symptomatique%3C%2Fspan%3E%3C%2Fb%3E%20%3A%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EMarie%20Curie%20souffre%20d%27une%20trop%20grande%20exposition%20aux%20%0D%0A%09%E9l%E9ments%20radioactifs%20qu%27elle%20%E9tudie%20depuis%201898%2C%20notamment%20%0D%0A%09%3Cspan%20style%3D%22font-weight%3A%20700%3B%20background-color%3A%20%23FFFF00%22%3Eau%20niveau%20des%20%0D%0A%09yeux%20et%20des%20oreilles%3C%2Fspan%3E.%20D%E8s%201920%2C%20elle%20pense%20que%20le%20radium%20pourrait%20avoir%20une%20%0D%0A%09certaine%20responsabilit%E9%20dans%20ses%20probl%E8mes%20de%20sant%E9.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EElle%20est%20%0D%0A%09%3Cspan%20style%3D%22font-weight%3A%20700%3B%20background-color%3A%20%23FFFF00%22%3Eatteinte%20d%92une%20leuc%E9mie%20radio-induite%3C%2Fspan%3E%20ayant%20%0D%0A%09d%E9clench%E9%20une%20an%E9mie%20aplasique.%20Malgr%E9%20sa%20faiblesse%2C%20elle%20continue%20d%92assurer%20%0D%0A%09la%20direction%20de%20la%20section%20de%20physique%20et%20chimie%20de%20l%92Institut%20du%20radium.%20Le%20%0D%0A%0929%20juin%201934%2C%20elle%20se%20rend%20au%20sanatorium%20de%20Sancellemoz%20%E0%20Passy%20%0D%0A%09%28Haute-Savoie%29%20pour%20y%20%EAtre%20hospitalis%E9e.%20%0D%0A%09%3Cspan%20style%3D%22font-weight%3A%20700%3B%20background-color%3A%20%23FFFF00%22%3EElle%20y%20d%E9c%E8de%3C%2Fspan%3E%20le%204%20juillet.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EC%27est%20pourquoi%2C%20bien%20que%20n%27%E9tant%20pas%20du%20tout%20un%20expert%20en%20%0D%0Aphysique%20quantique%20et%20en%20%0D%0Acr%E9ation%20de%20mini-trous%20noirs%2C%20je%20me%20demande%20l%E9gitimement%20s%27il%20n%27y%20a%20absolument%20aucun%20danger%20%E0%20engendrer%20des%20%0D%0Amicro-trous%20noirs%2C%20dans%20la%20mesure%20o%F9%20ces%20particules%20vont%20tr%E8s%20vite%2C%20et%20%0D%0Apourraient%20peut-%EAtre%20interagir%20avec%20la%20mati%E8re%20constituant%20le%20LHC%20lui-m%EAme.%20%0D%0APuisque%20ces%20micro-trous%20noirs%20ont%20une%3Cb%3E%20vitesse%20extr%EAme%3C%2Fb%3E%20%28ils%20ont%20donc%20le%20%0D%0Atemps%2C%20malgr%E9%20leur%20vie%20br%E8ve%2C%20de%20parcourir%20une%20distance%20suffisante%20pour%20entrer%20%0D%0Aen%20contact%20avec%20la%20mati%E8re%20aux%20alentours%29%2C%20qu%27est-ce%20qui%20les%20emp%EAche%20de%20rentrer%20en%20collision%20et%20d%27accaparer%20des%20particules%20ou%20atomes%20%0D%0Aenvironnants%20provenant%20des%20installations%20du%20LHC%20%3F%20Et%20donc%20de%20grossir%2C%20%0D%0Ad%27augmenter%20leur%20masse%2C%20leur%20pouvoir%20d%27attraction%2C%20leur%20dur%E9e%20de%20vie%2C%20et%20de%20%0D%0Agrossir%20sans%20fin%2C%20avalant%20toute%20la%20plan%E8te%20%3F%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ED%27autre%20part%2C%20des%20publications%20scientifiques%20r%E9centes%20%0D%0Aexpliquent%20que%20les%20scientifiques%20du%20CERN%20vont%20augmenter%20la%20puissance%20de%20leurs%20%0D%0Aexp%E9riences%20de%20mani%E8re%20significative%2C%20dans%20le%20but%20de%20tester%20l%27existence%20de%20dimensions%20suppl%E9mentaires%20%0D%0Ade%20la%20Nature%20%28elles%20existent%2C%20tous%20les%20Initi%E9s%20en%20parlent%29%2C%20en%20%0D%0Aatteignant%20notamment%20des%20%E9nergies%20jamais%20vues%20dans%20un%20laboratoire%20%3A%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3EAu%20grand%20collisionneur%20de%20hadrons%20%28LHC%29%20du%20CERN%2C%20%E0%20%0D%0A%09Gen%E8ve%2C%20se%20pr%E9pare%20une%20exp%E9rience%20qui%20pourrait%20r%E9volutionner%20la%20physique%20%0D%0A%09plus%20encore%20que%20la%20d%E9couverte%20du%20boson%20de%20Higgs%20%3A%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3E%ABCette%20exp%E9rience%20pourrait%20nous%20permettre%20d%92ouvrir%20une%20%0D%0A%09br%E8che%20vers%20d%92autres%20dimensions%BB%3A%20en%20g%E9n%E9ral%2C%20les%20scientifiques%20qui%20%0D%0A%09prononcent%20ce%20genre%20de%20phrase%20ont%20la%20bave%20aux%20l%E8vres%2C%20les%20cheveux%20en%20%0D%0A%09bataille%20et%20concluent%20leur%20expos%E9%20par%20un%20rire%20d%E9ment%20tandis%20que%20le%20jeune%20%0D%0A%09h%E9ros%20du%20film%20r%E9plique%20%3A%20%ABVous%20n%92avez%20pas%20le%20droit%20de%20d%E9fier%20les%20lois%20de%20la%20%0D%0A%09nature%2C%20professeur%20%21%20Je%20ne%20vous%20laisserai%20pas%20faire%20%21%3C%2Fp%3E%3Cfont%20color%3D%22%23FF0000%22%20face%3D%22arial%22%20size%3D%225%22%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFFCC%22%3E%3Cb%3E%20%5B...%5D%3C%2Fb%3E%3C%2Fspan%3E%3C%2Ffont%3E
|
• |
Physique quantique, relativité, et astrophysique : comment le LHC du CERN engendre des minis trous noirs (et l'immense possible danger qui en découle de disparition de l'Humanité et de la Terre toute entière) dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Finterstellar-trou-noir.jpg%22%20width%3D%221024%22%20height%3D%22683%22%20vspace%3D%227%22%3E%3Cbr%3E%0D%0A%3Cb%3EGargantua%2C%20le%20trou%20noir%20du%20film%20Interstellar.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EVoici%20une%20vid%E9o%20amateur%20qui%20d%E9mystifie%20quelques%20croyances%20%0D%0Aautour%20des%20trou%20noirs%2C%20et%20permet%20de%20clarifier%20certaines%20notions%20en%20astrophysique.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EBien%20que%2C%20comme%20l%27affirme%20la%20vid%E9o%2C%20le%20comportement%20d%27impact%20%0D%0Agravitationnel%20d%27un%20trou%20%0D%0Anoir%20soit%20le%20m%EAme%20que%20celui%20d%27une%20%E9toile%20ordinaire%2C%20il%20faut%20tout%20de%20m%EAme%20mettre%20%0D%0Aun%20b%E9mol%20en%20ce%20sens%20que%20la%20topologie%20aux%20abords%20d%27un%20trou%20noir%20est%20compl%E8tement%20%0D%0Adiff%E9rente%20%3A%3C%2Fp%3E%0D%0A%3Cul%3E%0D%0A%09%3Cli%3E%0D%0A%09Au%20niveau%20de%20l%27horizon%20des%20%E9v%E8nements%2C%20l%27espace%20est%20tellement%20courb%E9%20%0D%0A%09qu%27il%20se%20referme%20sur%20lui-m%EAme%2C%20ce%20qui%20signifie%20qu%27une%20une%20fois%20pass%E9%20cette%20%0D%0A%09fronti%E8re%2C%20vous%20%EAtes%20condamn%E9%20car%20vous%20ne%20pourrez%20plus%20jamais%20en%20ressortir.%3C%2Fli%3E%0D%0A%09%3Cli%3E%0D%0A%09Avant%20l%27horizon%20des%20%E9v%E8nements%2C%20et%20dans%20la%20zone%20appel%E9e%20ergosph%E8re%2C%20%0D%0A%09la%20gravit%E9%20est%20si%20forte%20que%20l%27espace-temps%20est%20entra%EEn%E9%20par%20l%27effet%20Lense-Thirring%2C%20%0D%0A%09comme%20de%20l%27eau%20dans%20le%20vortex%20d%27un%20tourbillon%20%3A%20vous%20vous%20d%E9placez%20en%20%0D%0A%09spirale%20vers%20le%20trou%20noir%2C%20alors%20m%EAme%20que%20vous%20%EAtes%20immobile%2C%20car%20%0D%0A%09l%27espace-temps%20dans%20lequel%20vous%20%EAtes%20bouge%2C%20est%20d%E9form%E9%20et%20attir%E9%20par%20le%20%0D%0A%09trou%20noir.%3C%2Fli%3E%0D%0A%09%3Cli%3E%0D%0A%09Avant%20l%27horizon%20des%20%E9v%E8nements%2C%20%E9galement%2C%20la%20gravit%E9%20est%20si%20intense%20%0D%0A%09que%20des%20effets%20de%20mar%E9e%20on%20lieu%2C%20m%EAme%20sur%20des%20tr%E8s%20courtes%20distances%20%3A%20un%20%0D%0A%09astronaute%20qui%20tomberait%20verticalement%20vers%20le%20trou%20noir%20subirait%20des%20acc%E9l%E9rations%20%0D%0A%09diff%E9rentes%20au%20niveau%20de%20sa%20t%EAte%20et%20de%20ses%20pieds%2C%20ce%20qui%20l%27%E9tirerait%20et%20le%20%0D%0A%09mettrait%20en%20pi%E8ces%26nbsp%3B%3A%20c%27est%20la%20spaghettification.%3C%2Fli%3E%0D%0A%3C%2Ful%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20vid%E9o%20tr%E8s%20int%E9ressante%2C%20d%27autant%20plus%20qu%27elle%20permet%20de%20%0D%0Acomprendre%20que%20les%20trous%20noirs%20de%20Schwarzschild%20%28ceux%20qui%20n%27ont%20pas%20de%20rotation%20%0D%0A%29%20n%27existent%20pas%20%3A%20il%20n%27y%20a%20dans%20l%27Univers%20que%20des%20trous%20noirs%20de%20Kerr%2C%20car%20les%20%0D%0A%E9toiles%20%E0%20neutrons%2C%20ou%20pulsars%2C%20tournent%20d%E9j%E0%20%E0%20des%20vitesses%20d%E9mentielles%2C%20et%20%0D%0Adonc%20les%20trou%20noirs%2C%20qui%20sont%20la%20phase%20suivante%20dans%20l%27%E9volution%20stellaire%20%28apr%E8s%20les%20%0D%0A%E9toiles%20%E9tranges%2C%20constitu%E9s%20principalement%20de%20quarks%29%2C%20bien%20%E9videmment%20tournent%20%0D%0Aaussi%20sur%20eux-m%EAmes%2C%20sans%20doute%20%E0%20de%20folles%20vitesses%20%E9galement%2C%20engendrant%20le%20fameux%20%0D%0Aet%20spectaculaire%20effet%20Lense-Thirring.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20attention%2C%20le%20narrateur%20parle%20%0D%0Atr%E8s%20vite%2C%20et%20donc%20les%20sous-titres%20vont%20vite%20aussi%2C%20alors%20soyez%20bien%20concentr%E9s.%3C%2Fb%3E%3C%2Fp%3E
|
• |
Astrophysique : mythes et légendes autour des trous noirs, et réalité dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Fearth%2520_spacetime_curvature.png%22%20width%3D%22660%22%20height%3D%22291%22%20vspace%3D%227%22%3E%3Cbr%3E%0D%0A%3Cb%3EInfluence%20de%20la%20masse%20de%20la%20Terre%20sur%20l%27espace-temps.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECette%20courte%20vid%E9o%20explique%20de%20mani%E8re%20simple%20et%20didactique%20%0D%0Ales%20influences%20de%20la%20gravitation%20sur%20le%20tissus%20de%20l%27espace-temps%2C%20qui%20n%27est%20pas%20%0D%0Acomme%20nous%20le%20croyons%20quelque%20chose%20d%27euclidien%20et%20d%27immuable%2C%20mais%20%E9lastique%2C%20%0D%0Ad%E9formable.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3EQu%27est-ce%20que%20l%27espace-temps%20%3F%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EEn%20physique%2C%20l%27espace-temps%20est%20une%20repr%E9sentation%20%0D%0A%09math%E9matique%20de%20l%27espace%20et%20du%20temps%20comme%20deux%20notions%20ins%E9parables%20et%20%0D%0A%09s%27influen%E7ant%20l%27une%20l%27autre.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ECette%20conception%20de%20l%27espace%20et%20du%20temps%20est%20l%27un%20des%20%0D%0A%09grands%20bouleversements%20survenus%20au%20d%E9but%20du%20XXe%20si%E8cle%20dans%20le%20domaine%20de%20la%20%0D%0A%09physique%2C%20mais%20aussi%20pour%20la%20philosophie.%20Elle%20est%20apparue%20avec%20la%20%0D%0A%09relativit%E9%20restreinte%20et%20sa%20repr%E9sentation%20g%E9om%E9trique%20qu%27est%20l%27espace%20de%20%0D%0A%09Minkowski%20%3B%20son%20importance%20a%20%E9t%E9%20renforc%E9e%20par%20la%20relativit%E9%20g%E9n%E9rale.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3E%C0%20noter%2C%20chose%20%E9tonnante%2C%20que%20la%20culture%20inca%20ne%20%0D%0A%09distingue%20pas%20l%27espace%20et%20le%20temps%20%3B%20l%27espace-temps%20est%20appel%E9%20%AB%20pacha%20%BB%2C%20en%20%0D%0A%09quechua%20et%20en%20aymara.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20excellente%20vid%E9o%20pour%20comprendre%20visuellement%2C%20du%20moins%20%0D%0Apour%20la%20m%E9trique%20spatiale%2C%20ce%20qui%20se%20passe%20dans%20la%20r%E9alit%E9.%20L%27%E9lasticit%E9%20%0D%0Atemporelle%2C%20elle%2C%20est%20un%20peu%20plus%20difficile%20%E0%20saisir%20pour%20notre%20esprit%2C%20habit%E9%20%E0%20%0D%0Ades%20cadences%20fig%E9es%20du%20temps%20que%20nous%20exp%E9rimentons.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Relativité : comment l'immense gravité des planètes, des étoiles, et des trous noirs, déforme le tissus de l'espace-temps dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Fpulsar_black_hole_grid-spacetime.jpg%22%20width%3D%22800%22%20height%3D%22600%22%20vspace%3D%227%22%3E%3Cbr%3E%0D%0A%3Cb%3ELorsque%20deux%20trous%20noirs%20fusionnent%2C%3Cbr%3E%0D%0Ails%20devraient%20%E9mettre%20des%20ondes%20gravitationnelles%20qui%20perturbent%20la%20p%E9riodicit%E9%20%0D%0Ades%20signaux%20radio%20des%20pulsars%3Cbr%3E%0D%0Aen%20d%E9formant%20le%20tissu%20de%20l%27espace%20temps.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20nouvelle%20%E9nigme%2C%20tout%20%E0%20fait%20inattendue%2C%20intrigue%20depuis%20%0D%0Apeu%20les%20astronomes%20et%20les%20astrophysiciens%20%3A%20l%92observatoire%20de%20Parkes%20du%20%0D%0ACommonwealth%20Scientific%20and%20Industrial%20Research%20Organisation%20%28CSIRO%29%20a%20traqu%E9%20%0D%0Apendant%2011%20ans%20des%20ondes%20gravitationnelles%2C%20ces%20ondes%20pr%E9dites%20par%20Einstein%20dans%20%0D%0Ale%20cadre%20de%20sa%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale.%20R%E9sultat%20%3A%20rien%2C%20z%E9ro%2C%20nada.%20%3F%3F%3F%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ESelon%20la%20th%E9orie%20d%92Einstein%2C%20lorsque%20des%20galaxies%20se%20%0D%0Arencontrent%20et%20que%20leurs%20trous%20noirs%20supermassifs%20respectifs%20fusionnent%2C%20des%20%0D%0Aondes%20gravitationnelles%20devraient%20%EAtre%20%E9mises%2C%20d%E9formant%20le%20tissus%20de%20l%27espace-temps%20et%20se%20%0D%0Apropageant%20%E0%20l%27infini%20dans%20l%27Univers.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ELes%20chercheurs%20du%20CSIRO%20enregistraient%20la%20p%E9riodicit%E9%20d%27un%20%0D%0Apulsar%20avec%20une%20grande%20pr%E9cision%20%3A%20un%20dix%20milliardi%E8mes%20de%20seconde.%20Si%20une%20onde%20%0D%0Agravitationnelle%20%E9tait%20pass%E9e%20suivant%20l%27axe%20%5Btrous%20noir%5D-%5Bpulsar%5D-%5BTerre%5D%2C%20la%20%0D%0Adistance%20entre%20deux%20pics%20d%27%E9mission%20du%20pulsar%20%28sa%20longueur%20d%27onde%20en%20quelque%20%0D%0Asorte%29%20aurait%20vari%E9%20de%2010%26nbsp%3Bm%E8tres%20environ.%20Or%2C%20aucune%20variation%20de%20fr%E9quence%20du%20%0D%0Apulsar%20n%27a%20%E9t%E9%20d%E9tect%E9e%20en%2011%20ans%20d%27%E9coute%20et%20d%27analyse...%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3EQu%27est-ce%20qu%27un%20pulsar%20%3F%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EUn%20pulsar%20est%20un%20objet%20astronomique%20produisant%20un%20signal%20%0D%0A%09p%E9riodique%20allant%20de%20l%27ordre%20de%20la%20milliseconde%20%E0%20quelques%20dizaines%20de%20%0D%0A%09secondes.%20Ce%20serait%20une%20%E9toile%20%E0%20neutrons%20tournant%20tr%E8s%20rapidement%20sur%20%0D%0A%09elle-m%EAme%20%28p%E9riode%20typique%20de%20l%27ordre%20de%20la%20seconde%2C%20voire%20beaucoup%20moins%20%0D%0A%09pour%20les%20pulsars%20milliseconde%29%20et%20%E9mettant%20un%20fort%20rayonnement%20%0D%0A%09%E9lectromagn%E9tique%20dans%20la%20direction%20de%20son%20axe%20magn%E9tique.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ELe%20nom%20de%20pulsar%20vient%20de%20ce%20que%20lors%20de%20leur%20d%E9couverte%2C%20%0D%0A%09ces%20objets%20ont%20dans%20un%20premier%20temps%20%E9t%E9%20interpr%E9t%E9s%20comme%20%E9tant%20des%20%E9toiles%20%0D%0A%09variables%20sujettes%20%E0%20des%20pulsations%20tr%E8s%20rapides.%20Pulsar%20est%20l%27abr%E9viation%20%0D%0A%09de%20%AB%20pulsating%20radio%20source%20%BB%20%28radiosource%20pulsante%29.%20Cette%20hypoth%E8se%20s%27est%20%0D%0A%09rapidement%20r%E9v%E9l%E9e%20incorrecte%2C%20mais%20le%20nom%20est%20rest%E9.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Wikip%E9dia.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Ffabetoile_naine_pulsar_trounoir.jpg%22%20width%3D%221077%22%20height%3D%22626%22%20vspace%3D%227%22%3E%3Cbr%3E%0D%0A%3Cb%3ESch%E9ma%20simplifi%E9%20%28il%20manque%20les%20%E9toiles%20%E0%20neutrons%2C%20les%20magnetars%2C%20et%20les%20%0D%0A%E9toiles%20%E9tranges%2C%20compos%E9es%20de%20quarks%29%20mais%20bien%20didactique%3Cbr%3E%0D%0Ad%27%E9volution%20des%20%E9toiles%20en%20naines%20%0D%0Ablanches%2C%20pulsars%20et%20trous%20noirs.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EEst-ce%20un%20manque%20de%20chance%20d%FB%20%E0%20une%20p%E9riode%20d%27observation%20%0D%0Atrop%20courte%20en%20regard%20des%20%E9chelles%20de%20temps%20de%20l%27Univers%20%3F%20On%20ne%20le%20sait%20pas%20%0D%0Aencore.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EEn%20tout%20cas%2C%20voil%E0%20bien%20une%20nouvelle%20%E9nigme%20qui%20va%20donner%20du%20%0D%0Afil%20%E0%20retordre%20%E0%20beaucoup%20de%20chercheurs%20dans%20le%20monde.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECela%20dit%2C%20ce%20n%27est%20qu%27une%20question%20de%20temps%20pour%20que%20cette%20%0D%0Anouvelle%20et%20intrigante%20%E9nigme%20soit%20r%E9solue.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EAffaire%20%E0%20suivre...%3C%2Fp%3E
|
• |
Nouvelle énigme en astronomie et en astrophysique : la fusion de trous noirs ne semble pas émettre d'ondes gravitationnelles et perturber la périodicité des signaux radio des pulsars dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cb%3E%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2Fsequence_principale_diag_hr_simplifie.jpg%22%20width%3D%22550%22%20height%3D%22497%22%20vspace%3D%227%22%3E%3Cbr%3E%0D%0ALe%20diagramme%20de%20Hertzsprung-Russell%20simplifi%E9%20o%F9%20figure%20les%20%E9toiles.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20courte%20vid%E9o%20id%E9ale%20pour%20s%27initier%20au%20fonctionnement%20%0D%0A%28simplifi%E9%29%20des%20%E9toiles.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EIl%20manque%20certaines%20choses%2C%20mais%20c%27est%20une%20excellente%20%0D%0Apremi%E8re%20approche%20qui%20conviendra%20parfaitement%20%E0%20tous%20de%20par%20son%20caract%E8re%20%0D%0Adidactique%20tr%E8s%20accessible.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E
|
• |
Astronomie et astrophysique de la vie et de la mort des étoiles : séquence principale, géantes rouges, naine blanches, supernovae, et trous noirs dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20un%20court%20entretien%20o%F9%20Jean-Pierre%20Luminet%2C%20%0D%0Agrand%20sp%E9cialiste%20des%20trous%20noirs%2C%20nous%20donne%20des%20pr%E9cisions%20%E9clairantes%20sur%20les%20%0D%0Amicro%20trous%20noirs%20et%20le%20rayonnement%20de%20Hawking.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EClair%2C%20didactique%2C%20pr%E9cis%2C%20et%20tr%E8s%20int%E9ressant.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20pour%20un%20meilleur%20confort%20auditif%2C%20j%27ai%20rehauss%E9%20le%20son%20de%20cette%20vid%E9o%20de%204%20dB.%3C%2Fb%3E%3C%2Fp%3E
|
• |
Gravitation, relativité, et physique quantique : Jean-Pierre Luminet sur l'évaporation des micro trous noirs et le rayonnement de (Stephen) Hawking dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%0D%0A%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2FAffiche_Luminet_forme%2520de%2520l_espace.jpg%22%20width%3D%22500%22%20height%3D%22708%22%3E%3C%2Fp%3E%0D%0A%3Cp%3E%26nbsp%3B%3C%2Fp%3E%0D%0A%3Cp%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EQuelle%20est%20la%20forme%20de%20l%27univers%20%3F%20Est-il%20fini%20ou%20infini%2C%20%0D%0A%09continu%20ou%20discontinu%2C%20lisse%20ou%20chiffonn%E9%20%3F%20Est-il%20perc%E9%20de%20trous%20noirs%20et%20%0D%0A%09de%20trous%20de%20vers%20le%20connectant%20%E0%20d%27autres%20univers%2C%20a-t-il%20des%20dimensions%20%0D%0A%09cach%E9es%20%3F%20Et%20s%27il%20%E9tait%20plus%20petit%20que%20pr%E9vu%20%3F%20Si%20des%20mirages%20%E0%20grande%20%0D%0A%09%E9chelle%20nous%20donnaient%20l%27illusion%20d%27un%20univers%20plus%20vaste%20qu%27en%20r%E9alit%E9%2C%20%0D%0A%09cr%E9ant%20plusieurs%20images%20%AB%20fant%F4mes%20%BB%20d%27une%20m%EAme%20galaxie%20%3F%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EEn%20octobre%202003%2C%20la%20prestigieuse%20revue%20Nature%20publiait%20en%20%0D%0A%09effet%20%E0%20sa%20%AB%20une%20%BB%20un%20article%20de%20J.-P%20Luminet%20qui%20faisait%20sensation%20%3A%20selon%20%0D%0A%09les%20derni%E8res%20donn%E9es%20observationnelles%20sur%20les%20vibrations%20de%20l%27univers%20%0D%0A%09primordial%2C%20l%27espace%20cosmique%20aurait%20la%20forme%20d%27un%20dod%E9ca%E8dre%20sph%E9rique%2C%20%0D%0A%09dont%20le%20volume%20ne%20repr%E9senterait%20que%2080%25%20de%20celui%20de%20l%27espace%20observ%E9.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ELa%20conf%E9rence%20est%20illustr%E9e%20par%20des%20extraits%20de%20films%20et%20%0D%0A%09de%20spectaculaires%20animations%20issues%20de%20simulations%20d%27ordinateur.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Jean-Pierre%20Luminet.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20conf%E9rence%20superbe%2C%20ultra-claire%2C%20didactique%2C%20o%F9%20l%27on%20%0D%0Aapprend%20%E9norm%E9ment%20de%20choses.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUn%20must%2C%20accessible%20%E0%20tous%2C%20qui%20passionnera%20tous%20les%20amoureux%20%0D%0Ad%27astrophysique%20et%20de%20cosmologie.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%C0%20voir%20absolument%20%21%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EMerci%20beaucoup%20Monsieur%20Jean-Pierre%20Luminet%20%21%20%3B%29%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20pour%20un%20meilleur%20confort%20auditif%2C%20j%27ai%20rehauss%E9%20le%20son%20de%20cette%20vid%E9o%20de%20%0D%0A9%20dB.%3C%2Fb%3E%3C%2Fp%3E
Must
|
• |
"La forme de l'espace : des trous noirs à l'Univers chiffonné" par Jean-Pierre Luminet - 11 janvier 2011 dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22center%22%3E%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2FUn%2520trou%2520noir%2520et%2520un%2520jet%2520-%2520Detail.jpg%22%20width%3D%221024%22%20height%3D%22414%22%20vspace%3D%226%22%3E%3C%2Fp%3E%0D%0A%3Cp%3ECette%20vid%E9o%20est%20un%20mini%20documentaire%20sur%20la%20formation%20et%20le%20r%F4le%20des%20plus%20%0D%0Agrands%20trous%20noirs%20de%20l%27univers.%3C%2Fp%3E%0D%0A%3Cp%3EUne%20odyss%E9e%20merveilleuse%2C%20o%F9%20l%27on%20va%20de%20surprise%20en%20surprise%2C%20qui%20apprendra%20%0D%0Am%EAme%20des%20choses%20%E0%20ceux%20qui%2C%20comme%20moi%2C%20sont%20des%20passionn%E9s%20des%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%3EUne%20vid%E9o%20tr%E8s%20didactique%2C%20lente%2C%20et%20compr%E9hensible%20par%20tous%2C%20agr%E9ment%E9e%20de%20%0D%0Asuperbes%20images%20et%20de%20simulations%20informatiques%20pointues%20%E9tonnantes.%3C%2Fp%3E%0D%0A%3Cp%3EIncontestablement%2C%20les%20monstres%20que%20sont%20les%20trous%20noirs%2C%20sont%20les%20objets%20les%20%0D%0Aplus%20%E9nigmatiques%20et%20les%20plus%20importants%20de%20tout%20le%20cosmos.%3C%2Fp%3E%0D%0A%3Cp%3EUn%20must%20qui%20ravira%20tous%20les%20aficionados%20des%20trous%20noirs%20et%20de%20la%20science.%3C%2Fp%3E%3Cp%3E%C0%20%0D%0Avoir%20absolument%20%21%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20la%20premi%E8re%20version%20de%20ce%20documentaire%2C%20plus%20courte%20mais%20%0D%0Aaussi%20tr%E8s%20int%E9ressante%2C%20peut%20%EAtre%20vue%20%E9galement%20sur%20ce%20site%2C%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3FNumVideo%3D2992%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22center%22%3E%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FExclusivite%2520mondiale%2520BlueMan%2520-%2520SANS%2520RECOPIE.jpg%22%20width%3D%22850%22%20height%3D%22150%22%3E%3C%2Fp%3E
Must
|
• |
"Les plus grands trous noirs dans l'univers" - Version 2 dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20un%20documentaire%20de%20la%20s%E9rie%20%26quot%3B%3Ci%3EL%27Univers%3C%2Fi%3E%26quot%3B%20%0D%0Aportant%20sur%20les%20quasars%20et%20les%20pulsars%2C%20ces%20astres%20fascinants.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EUn%20pulsar%20est%20le%20nom%20donn%E9%20%E0%20l%27objet%20astrophysique%20%0D%0A%09produisant%20un%20signal%20p%E9riodique%2C%20de%20fr%E9quences%20allant%20de%20l%27ordre%20de%20la%20%0D%0A%09milliseconde%20%E0%20quelques%20dizaines%20de%20secondes.%20Il%20est%20consid%E9r%E9%20comme%20%E9tant%20%0D%0A%09une%20%E9toile%20%E0%20neutrons%2C%20tournant%20tr%E8s%20rapidement%20sur%20elle-m%EAme%20%28p%E9riode%20%0D%0A%09typique%20de%20l%27ordre%20de%20la%20seconde%2C%20voire%20beaucoup%20moins%20pour%20les%20pulsars%20%0D%0A%09milliseconde%29%20et%20%E9mettant%20un%20fort%20rayonnement%20%E9lectromagn%E9tique%20dans%20la%20%0D%0A%09direction%20de%20son%20axe%20magn%E9tique.Pulsar%20est%20l%27abr%E9viation%20de%20%AB%20pulsating%20%0D%0A%09radio%20source%20%BB%20%28source%20radio%20pulsante%29.%20Cette%20hypoth%E8se%20s%27est%20rapidement%20%0D%0A%09r%E9v%E9l%E9e%20incorrecte%2C%20mais%20le%20nom%20est%20rest%E9%20%2Ctandis%20que%20le%20quasar%20%AB%20source%20de%20%0D%0A%09rayonnement%20quasi-stellaire%20%BB%2C%20%28quasi-stellar%20radio%20source%20en%20anglais%29%20est%20%0D%0A%09une%20galaxie%20lointaine%20et%20tr%E8s%20%E9nerg%E9tique%20avec%20un%20noyau%20galactique%20actif.%20Ce%20%0D%0A%09sont%20les%20objets%20les%20plus%20lumineux%20de%20l%27univers.%20%28%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20n%27a%20pas%20encore%20%E9t%E9%20%E9valu%E9e.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20si%20vous%20souhaitez%20obtenir%20la%20liste%20de%20tous%20les%20%0D%0Adocumentaires%20de%20cette%20s%E9rie%20disponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dl%27Univers%20%3A%20%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
Évaluée
|
• |
"L'Univers : Pulsars et Quasars (des trous noirs)" dans la catégorie "Science & Technologie" |
Vid%E9o%20non%20encore%20%E9valu%E9e.
Évaluée
|
• |
"Les quasars, c'est quoi ça ?" : des trous noirs dans la catégorie "Science & Technologie" |
%3Cp%3ECette%20vid%E9o%20est%20une%20conf%E9rence%20de%20Suzy%20Collin-Zahn%2C%20chercheur%20associ%E9e%20%E0%20%0D%0Al%27Observatoire%20de%20Paris%20Meudon%2C%20au%20LUTh%20%28Laboratoire%20Univers%20Th%E9ories%29%2C%20et%20qui%20%0D%0As%27est%20beaucoup%20int%E9ress%E9e%20aux%20quasars%20et%20aux%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%3ESes%20derniers%20ouvrages%20%3A%3C%2Fp%3E%0D%0A%3Cul%3E%0D%0A%09%3Cli%3EDes%20Quasars%20aux%20trous%20noirs%20chez%20EDP.%3C%2Fli%3E%0D%0A%09%3Cli%3EQuelle%20est%20notre%20place%20dans%20l%27Univers%20%28avec%20C%20Villain%29%20chez%20L%27Harmattan.%3C%2Fli%3E%0D%0A%3C%2Ful%3E%0D%0A%3Cp%3ECette%20vid%E9o%20n%27a%20pas%20encore%20%E9t%E9%20%E9valu%E9e.%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20pour%20rendre%20plus%20audible%20la%20conf%E9rence%2C%20j%27ai%20diminu%E9%20le%20son%20qui%20saturait%20de%2012%20dB.%3C%2Fb%3E%3C%2Fp%3E
Évaluée
|
• |
"Le mystère des trous noirs" par Suzy Collin-Zahn - 10 Novembre 2012 - Version avec son diminué dans la catégorie "Science & Technologie" |
%3Cp%3ECette%20vid%E9o%2C%20produite%20par%20la%20BBC%20en%202000%2C%20n%27a%20pas%20encore%20%E9t%E9%20%E9valu%E9e.%3C%2Fp%3E
Évaluée
|
• |
"Supermassive black holes" (Les trous noirs supermassifs) dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20un%20documentaire%20sur%20les%20trous%20noirs%20%3A%20%0D%0Ahistoire%20de%20leur%20th%E9orie%2C%20d%E9couvertes%20progressives%2C%20et%20leur%20r%F4le%20dans%20%0D%0Al%27%E9volution%20des%20galaxies%20et%20de%20l%27univers%20en%20g%E9n%E9ral.%3C%2Fp%3E%0D%0A%3Cp%3E%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ELes%20trous%20noirs%20%E0%20l%27origine%20des%20galaxies%26nbsp%3B%3F%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EIl%20y%20a%20encore%20peu%20de%20temps%2C%20on%20ne%20connaissait%20presque%20%0D%0A%09rien%20des%20ph%E9nom%E8nes%20extraordinaires%20que%20sont%20les%20trous%20noirs.%20Aujourd%27hui%2C%20%0D%0A%09les%20scientifiques%20ne%20sont%20plus%20les%20seuls%20%E0%20connaitre%20l%27existence%20de%20ces%20%0D%0A%09monstres.%20Des%20astronomes%20ont%20d%E9couvert%20la%20preuve%20qu%27il%20y%20en%20aurait%20un%20dans%20%0D%0A%09chaque%20galaxie%2C%20et%20qu%27ils%20joueraient%20un%20r%F4le%20capital%20dans%20la%20cr%E9ation%20de%20ces%20%0D%0A%09derni%E8res.%20Le%20trou%20noir%20de%20la%20Voie%20Lact%E9e%20pourrait%20%EAtre%20%E0%20l%27origine%20de%20son%20%0D%0A%09existence.%20Mais%20que%20se%20passera-t-il%20lorsque%20notre%20galaxie%20entrera%20en%20contact%20%0D%0A%09avec%20la%20galaxie%20voisine%20Androm%E8de%26nbsp%3B%3F%3C%2Fp%3E%0D%0A%09%3Cp%3ESource%20%3A%0D%0A%09Internet%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%3EUn%20magnifique%20documentaire%2C%20pour%20tout%20public%2C%20bien%20progressif%2C%20tr%E8s%20doux%2C%20bien%20didactique%2C%20absolument%20passionnant%2C%20ayant%20m%EAme%20un%20caract%E8re%20un%20peu%20po%E9tique%20gr%E2ce%20aux%20%0D%0Aillustrations%20sonores%20particuli%E8rement%20bien%20choisies.%20Un%20must.%20%C0%20voir%20par%20tous%20%0D%0Ales%20amoureux%20et%20les%20curieux%20des%20trous%20noirs.%3C%2Fp%3E
Must
|
• |
"L'aventure spatiale - Trous noirs : la menace" dans la catégorie "Science & Technologie" |
Voici%20une%20jolie%20et%20courte%20vid%E9o%20tr%E8s%20graphique%2C%20extraite%20du%20documentaire%20%26quot%3B%3Ci%3EDu%20%0D%0ABig%20Bang%20au%20vivant%26quot%3B%2C%3C%2Fi%3E%20sur%20les%20trous%20noirs%20et%20leurs%20manifestations%20hyper-violentes%20et%20cosmiques.%3Cp%3E%C0%20voir%20%21%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%201%20%3A%20le%20documentaire%20complet%20%26quot%3B%3Ci%3E%3Cfont%20color%3D%22%23FF0000%22%3EDu%20Big%20%0D%0ABang%20au%20vivant%3C%2Ffont%3E%3C%2Fi%3E%26quot%3B%20peut%20%EAtre%20%E9galement%20vu%20ce%20site%2C%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3FNumVideo%3D6135%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%202%20%3A%20pour%20afficher%20la%20liste%20de%20toutes%20les%20vid%E9os%20d%27Hubert%20Reeves%20disponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3DHubert%2520Reeves%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%203%20%3A%20pour%20afficher%20la%20liste%20de%20toutes%20les%20vid%E9os%20de%20Jean-Pierre%20Luminet%20disponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3DJean-Pierre%2520Luminet%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Comment détecter les trous noirs ?" par Hubert Reeves et Jean-Pierre Luminet dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%20une%20conf%E9rence%20de%20Pierre%20Bin%E9truy%20sur%20les%0D%0Atrous%20noirs%20et%20leur%20r%F4le%20dans%20la%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale%0D%0Ad%27Einstein.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3EQui%20est%20Pierre%20Bin%E9truy%20%3F%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%20%20%3Cp%20align%3D%22justify%22%3E%0D%0APierre%20Bin%E9truy%20est%20physicien%2C%20directeur%20du%20Laboratoire%20%AB%20AstroParticule%20et%20Cosmologie%20%BB%20%28APC%29%20de%20l%92Universit%E9%20Paris%207%20-%20Denis%20Diderot.%20Ses%20recherches%20th%E9oriques%20portent%20sur%20l%92%E9nergie%20noire%2C%20les%20dimensions%20suppl%E9mentaires%20de%20l%92espace%20et%20les%20ondes%20gravitationnelles.%20Il%20participe%20%E9galement%20%E0%20des%20projets%20internationaux%20tels%20que%20Lisa%2C%20trois%20satellites%20dont%20le%20lancement%20pr%E9vu%20en%202012%20devrait%20permettre%20de%20d%E9tecter%20les%20ondes%20gravitationnelles%20pr%E9dites%20dans%20la%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale%20d%92Einstein.%20Il%20est%20aussi%20l%92auteur%20de%20tr%E8s%20nombreux%20articles%20scientifiques%20et%20d%92ouvrages%20de%20vulgarisation%20pour%20les%20enfants%20et%20le%20grand%20public.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%0D%0AC%92est%20%E0%20travers%20l%92une%20des%20cons%E9quences%20les%20plus%20%E9tonnantes%20de%20la%20relativit%E9%20g%E9n%E9rale%2C%20l%92existence%20de%20trous%20noirs%2C%20que%20Pierre%20Bin%E9truy%20abordera%20les%20principaux%20concepts%20de%20la%20relativit%E9%20g%E9n%E9rale.%20Un%20voyage%20%E0%20l%92int%E9rieur%20d%92un%20trou%20noir%20sera%20l%92occasion%20de%20voir%20comment%20la%20physique%20du%20XXe%20si%E8cle%20r%E9volutionne%20nos%20notions%20d%92espace%20et%20de%20temps.%20Cette%20nouvelle%20vision%20de%20l%92Univers%20est%20pourtant%20n%E9cessaire%20pour%20comprendre%20notre%20environnement%20%3A%20au%20sein%20m%EAme%20de%20notre%20galaxie%2C%20on%20pense%20avoir%20trouv%E9%20un%20gigantesque%20trou%20noir%20dont%20la%20masse%20est%20plusieurs%20millions%20de%20fois%20la%20masse%20du%20soleil.%3C%2Fp%3E%0D%0A%20%20%3Cp%20align%3D%22justify%22%3EEst-il%20possible%20d%92appr%E9hender%20la%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale%2C%20qui%20marqua%20profond%E9ment%20le%2020%E8me%20si%E8cle%2C%20sans%20%EAtre%20aussi%20cal%E9%20qu%92Einstein%20%3F%20Quel%20r%F4le%20y%20joue%20la%20gravitation%20%3F%20Qu%92est-ce%20que%20l%92espace-temps%20%3F%20En%20quoi%20la%20relativit%E9%20%E9tait-elle%20r%E9volutionnaire%20%3F%20L%92est-elle%20toujours%20aujourd%92hui%20%3F%20C%92est%20%E0%20travers%20l%92une%20des%20cons%E9quences%20les%20plus%20%E9tonnantes%20de%20la%20relativit%E9%20g%E9n%E9rale%2C%20l%92existence%20de%20trous%20noirs%2C%20que%20Pierre%20Bin%E9truy%20abordera%20les%20principaux%20concepts%20de%20la%20relativit%E9%20g%E9n%E9rale.%20Un%20voyage%20%E0%20l%92int%E9rieur%20d%92un%20trou%20noir%20sera%20l%92occasion%20de%20voir%20comment%20la%20physique%20du%20XXe%20si%E8cle%20r%E9volutionne%20nos%20notions%20d%92espace%20et%20de%20temps.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3ESource%20%3A%20%3Ca%20href%3D%22http%3A%2F%2Fwww.agrobiosciences.org%2Farticle.php3%3Fid_article%3D2222%22%20target%3D%22_blank%22%3Ehttp%3A%2F%2Fwww.agrobiosciences.org%2Farticle.php3%3Fid_article%3D2222%3C%2Fa%3E%0D%0A%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%0D%0A%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22center%22%3E%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNotion%2520d%27horizon%2520d%27un%2520trou%2520noir.jpg%22%3E%0D%0A%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20excellente%20conf%E9rence%2C%20pour%20tout%20public.%20Seul%20regret%2C%20la%20qualit%E9%20de%20la%20vid%E9o%20laisse%20%E0%20d%E9sirer%20%28sa%20r%E9solution%20est%20trop%20faible%29%20et%20le%20conf%E9rencier%20ma%EEtrise%20mal%20la%20parole%20%28%22%3Ci%3Eheu...%2C%20heu...%3C%2Fi%3E%29.%20%C0%20voir%20n%E9anmoins%2C%20car%20int%E9ressante%20et%20bien%20didactique.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20vous%20pouvez%20t%E9l%E9charger%20le%20cahier%20PDF%20de%20la%0D%0Aconf%E9rence%20avec%20les%20illustrations%2C%20%3Ca%20href%3D%22http%3A%2F%2Fwww.agrobiosciences.org%2FIMG%2Fpdf%2FCahier_trous_noirs_V1.pdf%22%20target%3D%22_blank%22%3E%5Bici%5D%3C%2Fa%3E%0D%0A%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%3C%2Fb%3E%0D%0A%3C%2Fp%3E
|
• |
"Quand les trous noirs éclairent la théorie d'Einstein", une conférence de Pierre Binétruy dans la catégorie "Science & Technologie" |
%3Cu%3E%3Cb%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fb%3E%3C%2Fu%3E%3Cblockquote%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ELa%20th%E9orie%20de%20la%20relativit%E9%20g%E9n%E9rale%2C%20les%20mod%E8les%20de%20trous%20noirs%20et%20les%20solutions%20cosmologiques%20de%20type%20%22%20big-bang%20%22%20qui%20en%20d%E9coulent%2C%20d%E9crivent%20des%20espace-temps%20courb%E9s%20par%20la%20gravitation%2C%20sans%20toutefois%20trancher%20sur%20certaines%20questions%20fondamentales%20quant%20%E0%20la%20nature%20de%20l%27espace.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3E%26nbsp%3BQuelle%20est%20sa%20structure%20g%E9om%E9trique%20%E0%20grande%20et%20%E0%20petite%20%E9chelle%20%3F%20Est-il%20continu%20ou%20discontinu%2C%20fini%20ou%20infini%2C%20poss%E8de-t-il%20des%20%22%20trous%20%22%20ou%20des%20%22%20poign%E9es%20%22%2C%20contient-il%20un%20seul%20feuillet%20ou%20plusieurs%2C%20est-il%20%22%20lisse%20%22%20ou%20%22%20chiffonn%E9%20%22%20%3F%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EDes%20approches%20r%E9centes%20et%20encore%20sp%E9culatives%2C%20comme%20la%20gravit%E9%20quantique%2C%20les%20th%E9ories%20multidimensionnelles%20et%20la%20topologie%20cosmique%2C%20ouvrent%20des%20perspectives%20in%E9dites%20sur%20ces%20questions.%3C%2Fp%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3EJe%20d%E9taillerai%20deux%20aspects%20particuliers%20de%20cette%20recherche.%3C%2Fp%3E%0D%0A%09%3Cul%3E%0D%0A%09%09%3Cli%3E%0D%0A%09%09Le%20premier%20sera%20consacr%E9%20aux%20trous%20noirs.%20Astres%20dont%20l%27attraction%20est%20si%20intense%20que%20rien%20ne%20peut%20s%27en%20%E9chapper%2C%20les%20trous%20noirs%20sont%20le%20triomphe%20ultime%20de%20la%20gravitation%20sur%20la%20mati%E8re%20et%20sur%20la%20lumi%E8re.%20Je%20d%E9crirai%20les%20distorsions%20spatio-temporelles%20engendr%E9es%20par%20les%20trous%20noirs%20et%20leurs%20propri%E9t%E9s%20exotiques%20%3A%20extraction%20d%27%E9nergie%2C%20%E9vaporation%20quantique%2C%20singularit%E9s%2C%20trous%20blancs%20et%20trous%20de%20ver%2C%20destin%20de%20la%20mati%E8re%20qui%20s%27y%20engouffre%2C%20sites%20astronomiques%20o%F9%20l%27on%20pense%20les%20avoir%20d%E9busqu%E9s.%3C%2Fli%3E%0D%0A%09%09%3Cli%3E%0D%0A%09%09Le%20second%20aspect%20d%E9crira%20les%20recherches%20r%E9centes%20en%20topologie%20cosmique%2C%20o%F9%20l%27espace%20%22%20chiffonn%E9%20%22%2C%20fini%20mais%20de%20topologie%20multiconnexe%2C%20donne%20l%27illusion%20d%27un%20espace%20d%E9pli%E9%20plus%20vaste%2C%20peupl%E9%20d%27un%20grand%20nombre%20de%20galaxies%20fant%F4mes.%20L%27univers%20observable%20acquiert%20ainsi%20la%20forme%20d%27un%20%22%20cristal%20%22%20dont%20seule%20une%20maille%20correspond%20%E0%20l%27espace%20r%E9el%2C%20les%20autres%20mailles%20%E9tant%20des%20r%E9pliques%20distordues%20emplies%20de%20sources%20fant%F4mes.%3C%2Fli%3E%0D%0A%09%3C%2Ful%3E%0D%0A%09%3Cp%20align%3D%22justify%22%3ESource%20%3A%20Canal%20U.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20conf%E9rence%20de%20premier%20ordre%20donn%E9e%20par%20un%20homme%20sympathique%2C%20tr%E8s%20p%E9dagogue%20et%20didactique%2C%20qui%20s%27exprime%20clairement%20et%20parfois%20avec%20un%20peu%20de%20po%E9sie%2C%20et%20qui%20manifestement%20a%20tr%E8s%20bien%20pr%E9par%E9%20sa%20conf%E9rence%20en%20plus%20d%27%EAtre%20un%20expert%20sur%20le%20sujet.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20r%E9f%E9rence%20pour%20tous%20ceux%20qui%20s%27int%E9ressent%20aux%20trous%20noirs%20et%20aux%20myst%E8res%20de%20l%27espace-temps%20%E9lastique%20et%20dynamique.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20sorte%20de%20must%20dans%20son%20genre%2C%20qui%20r%E9v%E8le%20les%20recherches%20%E9tonnantes%20en%20topologie%20cosmologique.%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20La%20conf%E9rence%20est%20suivie%20des%20questions%20des%20spectateurs.%3C%2Fb%3E%3C%2Fp%3E
Must
|
• |
"Les trous noirs et la forme de l'espace" par Jean-Pierre Luminet - 5 Juillet 2000 dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%20est%20un%20documentaire%20pr%E9sent%E9%20par%20l%27acteur%20am%E9ricain%20Morgan%20Freenman%20qui%20expose%20et%20explique%20de%20nombreux%20aspects%20de%20la%20recherche%20et%20du%20comportement%20des%20trous%20noirs.%3Cbr%3E%3Cbr%3EUn%20documentaire%20bien%20didactique%20int%E9ressant%20et%20divertissant.%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20pour%20afficher%20toutes%20les%20vid%E9os%20de%20la%20s%E9rie%20%26quot%3B%3Cfont%20color%3D%22%23FF0000%22%3E%3Ci%3EVoyage%20%0D%0Adans%20l%27espace-temps%3C%2Fi%3E%3C%2Ffont%3E%26quot%3B%20disponibles%20sur%20ce%20site%2C%20%0D%0Acliquez%0D%0A%3Ca%20href%3Dhttps%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dvoyage%2520dans%2520l%2527espace-temps%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Voyage dans l'espace-temps - Les trous noirs" dans la catégorie "Science & Technologie" |
Une%20vid%E9o%20courte%20et%20sans%20pr%E9tention%20mais%20qui%20a%20le%20m%E9rite%20d%27%EAtre%20claire.%3Cbr%3E%3Cbr%3EId%E9ale%20comme%20premi%E8re%20approche%20pour%20les%20tout%20novices%20en%20la%20mati%E8re.
|
• |
Un bref aperçu des trous noirs par Jean-Luc Robert-Esil dans la catégorie "Science & Technologie" |
%22%3Ci%3EAvec%20les%20nouvelles%20donn%E9es%20issues%20des%20t%E9lescopes%20Keck%2C%20Andrea%20Ghez%20nous%20montre%20comment%20les%20optiques%20adaptatives%20%E0%20la%20pointe%20de%20la%20technologie%20aident%20les%20astronomes%20%E0%20comprendre%20les%20objets%20les%20plus%20myst%E9rieux%20de%20notre%20univers%20%3A%20les%20trous%20noirs.%20Elle%20apporte%20aussi%20la%20preuve%20qu%27un%20gigantesque%20trou%20noir%20pourrait%20se%20tapir%20dans%20le%20centre%20de%20la%20Voie%20Lact%E9e.%3C%2Fi%3E%22%3Cbr%3E%3Cbr%3EUne%20vid%E9o%20qui%20int%E9ressera%20les%20amoureux%20des%20trous%20noirs%2C%20bien%20que%20donnant%20des%20explications%20tr%E8s%20l%E9g%E8res%2C%20et%20destin%E9es%20surtout%20aux%20personnes%20novices%20en%20la%20mati%E8re.%3Cbr%3E%3Cbr%3EContrairement%20%E0%20ce%20qu%27affirme%20la%20conf%E9renci%E8re%2C%20on%20ne%20sait%20pas%20du%20tout%20ce%20qu%27il%20y%20a%20au%20del%E0%20de%20l%27horizon%20d%27un%20trou%20noir%2C%20et%20dire%20que%20toute%20sa%20masse%20en%20r%E9duite%20en%20un%20point%20est%20un%20non-sens%20d%E9duit%20idiotement%20d%27%E9quations%20continues%20alors%20m%EAmes%20que%20l%27Univers%20a%20une%20structure%20discontinue%20dans%20l%27infiniment%20petit%2C%20et%20que%20dans%20cet%20univers%2C%20tout%20est%20quantifi%E9%20et%20fini%20%3A%20tout%20a%20un%20poids%2C%20une%20mesure%20quelconque%2C%20etc.%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20le%20son%20dispara%EEt%20%E0%2013%3A03%20mais%20pas%20les%20sous-titres%20qui%20permettent%20n%E9anmoins%20de%20terminer%20de%20suivre%20la%20conf%E9rence%20au%20complet.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"La chasse aux trous noirs supermassifs" par Andrea Ghez - TEDx dans la catégorie "Science & Technologie" |
%3Cp%3ECette%20vid%E9o%20est%20une%20conf%E9rence%20donn%E9e%20par%20Thierry%20Foglizzo%2C%20astrophysicien%20au%20CEA%20de%20Saclay%2C%20en%20France%2C%20sur%20les%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%3EUne%20vid%E9o%20%E0%20voir%20car%20d%E9livrant%20des%20informations%20que%20les%20documentaires%20traditionnels%20sur%20les%20trous%20noirs%20ne%20pr%E9sentent%20pas%2C%20notamment%20les%20ph%E9nom%E8nes%20successifs%20des%20limites%20d%92%E9crasement%20des%20%E9lectrons%20et%20des%20neutrons.%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20j%27ai%20remix%E9%20le%20son%20en%20mono%20et%20l%27ai%20rehauss%E9%20de%203%20dB%20car%20le%20son%20%0D%0Aoriginal%20ne%20sortait%20que%20du%20c%F4t%E9%20gauche%2C%20et%20c%27%E9tait%20tr%E8s%20d%E9sagr%E9able%20pour%20%0D%0Al%27%E9coute%20et%20la%20concentration.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Les trous noirs, objets mathématiques et réels" par Thierry Foglizzo dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3E%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2FLe%2520destin%2520de%2520l_univers%2520-%2520Trous%2520noirs%2520et%2520energie%2520sombre.jpg%22%20align%3D%22right%22%20hspace%3D%2220%22%20vspace%3D%225%22%20width%3D%22400%22%20height%3D%22542%22%3ECette%20vid%E9o%20est%20une%20conf%E9rence%20donn%E9e%20le%2027%20F%E9vrier%202007%0D%0Apar%20Jean-Pierre%20Luminet%20%E0%20%26quot%3B%3Ci%3El%27Espace%20des%20Sciences%3C%2Fi%3E%26quot%3B%20sur%20le%0D%0Ath%E8me%20des%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3EQui%20est%20Jean-Pierre%20Luminet%20%3F%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%20%20%3Cp%20align%3D%22justify%22%3EJean-Pierre%20Luminet%20%28n%E9%20en%201951%29%20est%20un%20astrophysicien%2C%20conf%E9rencier%2C%20%E9crivain%20et%20po%E8te%20fran%E7ais%2C%20sp%E9cialiste%20de%20r%E9putation%20mondiale%20des%20trous%20noirs%20et%20de%20la%20cosmologie.%3C%2Fp%3E%0D%0A%20%20%3Cp%20align%3D%22justify%22%3EIl%20est%20directeur%20de%20recherches%20au%20CNRS%2C%20membre%20du%20Laboratoire%20Univers%20et%20Th%E9ories%20%28LUTH%29%20de%20l%92observatoire%20de%0D%0A%20%20Paris-Meudon.%3C%2Fp%3E%0D%0A%20%20%3Cp%20align%3D%22justify%22%3ESource%20%3A%20%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FJean-Pierre_Luminet%22%20target%3D%22_blank%22%3Ehttp%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FJean-Pierre_Luminet%3C%2Fa%3E%26nbsp%3B%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%3C%2Fp%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%20A%20l%27occasion%20de%20la%20parution%20de%20son%20dernier%20ouvrage%2C%20Jean-Pierre%20Luminet%20fait%20le%20point%20sur%20les%20propri%E9t%E9s%20extravagantes%20des%20trous%20noirs%20%3A%20machines%20%E0%20produire%20de%20l%27%E9nergie%2C%20ordinateurs%20supr%EAmes%2C%20portes%20de%20passage%26nbsp%3Bvers%20d%27autres%20univers%2C%20maelstr%F6ms%20emportant%20dans%20leur%20ronde%20mati%E8re%2C%20espace%20et%20temps.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%20Des%20microscopiques%20aux%20g%E9ants%20en%20passant%20par%20les%20stellaires%2C%20les%20trous%20noirs%20se%20r%E9v%E8lent%20aux%20astronomes%20selon%20une%20panoplie%20de%26nbsp%3Bph%E9nom%E8nes%20allant%20des%0D%0A%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FHypernovae%22%20target%3D%22_blank%22%3E%20hypernovae%3C%2Fa%3E%0D%0A%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29%0D%0Aaux%20%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FQuasar%22%20target%3D%22_blank%22%3Equasars%3C%2Fa%3E%20%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29%2C%20en%20passant%20par%20les%0D%0A%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FBinaire_X%22%20target%3D%22_blank%22%3E%20sources%20X%20binaires%3C%2Fa%3E%0D%0A%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29%0D%0Aet%20les%20%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FLentille_gravitationnelle%22%20target%3D%22_blank%22%3E%20lentilles%0D%0Agravitationnelles%3C%2Fa%3E%20%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%20Enfin%2C%20aux%20c%F4t%E9s%20de%20la%20myst%E9rieuse%20%E9nergie%20sombre%2C%20les%20trous%20noirs%20semblent%20devoir%20jouer%20un%26nbsp%3Br%F4le%20pr%E9pond%E9rant%20dans%20le%20destin%20%E0%20tr%E8s%20long%20terme%20de%20l%27Univers.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%20La%20conf%E9rence%20est%20d%E9compos%E9e%20en%204%20grandes%20parties%20%3A%3C%2Fp%3E%0D%0A%3Cul%3E%0D%0A%20%20%3Cli%3E%0D%0A%20%20%20%20Formation%20des%20trous%20noirs%2C%3C%2Fli%3E%0D%0A%20%20%3Cli%3E%0D%0A%20%20%20%20Physique%20des%20trous%20noirs%2C%3C%2Fli%3E%0D%0A%20%20%3Cli%3E%0D%0A%20%20%20%20Observation%20des%20trous%20noirs%2C%3C%2Fli%3E%0D%0A%20%20%3Cli%3E%0D%0A%20%20%20%20Le%20destin%20de%20l%27Univers.%3C%2Fli%3E%0D%0A%3C%2Ful%3E%0D%0A%3C%2Fblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3EQuatri%E8me%20de%20couverture%20du%20livre%20%3A%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cblockquote%3E%0D%0A%3Cp%20align%3D%22justify%22%3ELe%20bestiaire%20de%20l%27astrophysique%20regorge%20de%20cr%E9atures%20%E9tranges%2C%20plac%E9es%20sous%20l%27emprise%20d%27une%20gravit%E9%20omnipotente%20%3A%20blafardes%20naines%20blanches%2C%20%E9toiles%20%E0%20neutrons%20hyperdenses%2C%20supernovae%20apocalyptiques%2C%20hypernovae%20et%20sursauts%20gamma.%20Mais%20les%20plus%20myst%E9rieuses%20et%20les%20plus%20excitantes%20d%27entre%20elles%20sont%20sans%20conteste%20les%20trous%20noirs.%20D%27une%20compacit%E9%20extr%EAme%2C%20parfaitement%20invisibles%20s%27ils%20sont%20nus%2C%20ces%20puits%20extraordinaires%20de%20l%27espace-temps%20deviennent%20les%20astres%20les%20plus%20brillants%20de%20l%27Univers%20d%E8s%20lors%20qu%27ils%20d%E9vorent%20du%20gaz%2C%20ou%20m%EAme%20des%20%E9toiles%20enti%E8res.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0A%C0%20la%20recherche%20du%20destin%20de%20l%27Univers%2C%20Jean-Pierre%20Luminet%20retrace%20pour%20nous%20les%20grandes%20%E9tapes%20de%20l%27%E9volution%20cosmique%20et%20nous%20invite%20%E0%20voyager%20au%20coeur%20de%20l%27invisible%2C%20sujet%20dont%20il%20s%27est%20fait%20une%20sp%E9cialit%E9.%20Ce%20faisant%2C%20il%20nous%20d%E9voile%20les%20propri%E9t%E9s%20extravagantes%20des%20trous%20noirs%20%3A%20maelstr%F6ms%20emportant%20dans%20leur%20ronde%20mati%E8re%2C%20espace%20et%3Cfont%20color%3D%22%23FF0000%22%20face%3D%22arial%22%20size%3D%225%22%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFFCC%22%3E%3Cb%3E%20%5B...%5D%3C%2Fb%3E%3C%2Fspan%3E%3C%2Ffont%3E
|
• |
"Le destin de l'Univers : trous noirs et énergie sombre" par Jean-Pierre Luminet dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%20est%20un%20petit%20documentaire%20sur%20les%20trous%20noirs.%3Cbr%3E%3Cbr%3ECourt%20mais%20bien%20int%E9ressant.
|
• |
"Les mystères du cosmos - Plongée dans les trous noirs" dans la catégorie "Science & Technologie" |
%3Cp%3ECette%20vid%E9o%20est%20une%20r%E9alisation%20du%20CNES%20et%20du%20CNRS%20o%F9%20Eric%20Gourgoulhon%2C%0D%0Aastrophysicien%20au%20Laboratoire%20de%20l%92Univers%20et%20de%20ses%20th%E9ories%20du%20CNRS%20fait%0D%0Aune%20petite%20synth%E8se%20du%20type%20d%27objet%20stellaire%20le%20plus%20d%E9mentiel%20dans%0D%0Al%27Univers.%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3ELes%20conclusions%20effarantes%20auxquelles%20je%20suis%20arriv%E9%20%3A%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%3EQuand%20je%20qualifie%20de%20d%E9mentiels%20les%20trous%20noirs%2C%20je%20p%E8se%20%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FICONES%2FIcone%2520-%2520Clin%2520d%27oeil.gif%22%20width%3D%2215%22%20height%3D%2217%22%3E%29%0D%0Ames%20mots%2C%20consid%E9rant%20%E0%20ce%20stade%20de%20mes%20recherches%2C%20que%0D%0Ales%20trous%20noirs%20sont%20les%20balayeuses%20ultimes%20de%20l%27Univers%20%28m%EAme%20si%20au%20pr%E9alable%0D%0Aces%20astres%20sont%20aussi%20des%20catapultes%20formidables%20de%20diffusion%20de%20mati%E8re%29%2C%20et%0D%0Aqu%27%3Cb%3E%3Cfont%20color%3D%22%23FF0000%22%3Eau%20final%2C%20l%27Univers%20finira%0D%0Apar%20se%20contracter%20en%20un%20unique%20et%20gigantesque%20trou%20noir%3C%2Ffont%3E%3C%2Fb%3E.%3C%2Fp%3E%0D%0A%3Cp%3EJ%27en%20suis%20venu%20%E0%20cette%20conclusion%20%E0%20partir%20des%20constatations%20suivantes%0D%0Aauxquelles%20je%20suis%20arriv%E9%20%3A%3C%2Fp%3E%0D%0A%3Cul%3E%0D%0A%20%20%3Cli%3EUn%20trou%20noir%20na%EEt%2C%20mais%20ne%20meurt%20pas%2C%20contrairement%20%E0%20tout%20le%20reste%20dont%0D%0A%20%20%20%20la%20dynamique%20est%20subordonn%E9e%20aux%20lois%20l%27%E9volution%20et%20d%27involution%20%28tout%0D%0A%20%20%20%20na%EEt%2C%20croit%2C%20se%20d%E9veloppe%2C%20atteint%20une%20apog%E9e%2C%20d%E9cline%2C%20d%E9g%E9n%E8re%2C%20et%0D%0A%20%20%20%20meurt%29.%3C%2Fli%3E%0D%0A%20%20%3Cli%3EUn%20trou%20noir%20ne%20peut%20que%20grossir%20%3A%20inexorablement%2C%20il%20grossit%20parce-qu%27il%20happe%0D%0A%20%20%20%20incessamment%20de%20la%20mati%E8re%20%28m%EAme%20si%20il%20peut%20exister%20des%20p%E9riodes%0D%0A%20%20%20%20d%27alimentation%20plus%20calmes%2C%20ce%20qui%20ne%20change%20rien%20au%20final%29%2C%20ce%20qui%20augmente%0D%0A%20%20%20%20in%E9luctablement%20sa%20masse%2C%20le%20rendant%20de%20plus%20en%20plus%20attractif%0D%0A%20%20%20%20et%20dangereux%2C%20son%20pouvoir%20d%27influence%20et%20son%20horizon%20des%20%E9v%E8nements%20ne%0D%0A%20%20%20%20cessant%20de%20s%27%E9tendre.%3C%2Fli%3E%0D%0A%20%20%3Cli%3ELe%20nombre%20de%20trous%20noirs%20dans%20l%27Univers%20ne%20cesse%20d%27augmenter%20car%20il%20se%20cr%E9e%0D%0A%20%20%20%20en%20effet%20contin%FBment%20des%20trous%20noirs%20%3A%20environ%20une%20%E9toile%20sur%201000%20va%20se%0D%0A%20%20%20%20convertir%20en%20trou%20noir%20en%20fin%20de%20vie%2C%20en%20raison%20de%20sa%20forte%20masse.%3C%2Fli%3E%0D%0A%3C%2Ful%3E%0D%0A%3Cp%3E%3Cfont%20color%3D%22%23FF0000%22%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFF00%22%3E%3Cb%3EConclusion%20%3A%20inexorablement%2C%20les%20trous%20noirs%0D%0Ane%20cessent%20de%20gagner%20du%20terrain%20dans%0D%0Al%27Univers%20%3A%20ils%20deviennent%20%E0%20la%20fois%20plus%20massifs%20et%20plus%20nombreux%20et%20de%0D%0Amani%E8re%20irr%E9versible.%20L%27issue%20de%20l%27Univers%20est%20donc%20fatale...%3C%2Fb%3E%3C%2Fspan%3E%3C%2Ffont%3E%3C%2Fp%3E%0D%0A%3Cp%3ECertains%20scientifiques%20affirment%20m%EAme%20que%20notre%20galaxie%2C%20la%20%26quot%3B%3Ci%3EVoie%20Lact%E9e%3C%2Fi%3E%26quot%3B%2C%0D%0Acontient%20actuellement%20au%20moins%20100%20millions%20de%20trous%20noirs%2C%20dont%20le%20plus%20massif%0D%0Aest%20au%20centre%20m%EAme%20de%20la%20galaxie...%20Tout%20cela%20va%20mal%20finir%2C%20c%27est%20certain%20%21%3C%2Fp%3E%0D%0A%0D%0A%3Cp%3ESeule%20question%20que%20je%20me%20pose%20%3A%20si%20deux%20trous%20noirs%20%E0%20peu%20%E9quivalents%20en%0D%0Amasse%20se%20percutent%20frontalement%2C%20est-ce%20qu%27ils%20fusionnent%20int%E9gralement%2C%20ou%0D%0Abien%20peut-il%20se%20produire%20un%20d%E9chirement%20de%20leur%20noyau%20qui%20permettrait%20une%0D%0Aouverture%20temporaire%20de%20horizon%20d%27%E9v%E8nement%2C%20et%20lib%E9rer%20ainsi%20une%20formidable%20quantit%E9%0D%0Ad%27%E9nergie%20et%20de%20mati%E8re%20%3F%20Si%20vous%20avez%20une%20id%E9e%20argument%E9e%2C%20%E9crivez%20moi%20%21%20%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FICONES%2FIcone%2520-%2520Bondissant.gif%22%20width%3D%2218%22%20height%3D%2231%22%3E%3C%2Fp%3E%0D%0A%0D%0A%3Cp%3EEnfin%2C%20il%20se%20pourrait%20que%20les%20trous%20noirs%20finissent%20par%20exploser%2C%20par%0D%0Al%27ouverture%20de%20leur%20horizon%20d%27%E9v%E8nement%20et%20%E0%20la%20gravit%E9%20devant%20beaucoup%20plus%0D%0Afaible%20suite%20%E0%20la%20d%E9sint%E9gration%20des%20particules%20formant%20la%20singularit%E9.%20En%0D%0Aeffet%2C%20les%20atomes%20ne%20sont%20pas%20%E9ternels.%20Comme%20pour%20les%20%E9l%E9ments%20radio-actifs%2C%0D%0Ails%20ont%20une%20dur%E9e%20de%20vie%20tr%E8s%20grande%29.%20Aussi%20il%20se%20pourrait%20qu%27une%20myriade%20de%0D%0Aces%20particules%20se%20d%E9sint%E9grant%20finalement%2C%20la%20masse%20du%20trou%20noir%20diminue%20tr%E8s%0D%0Afortement%2C%20permettant%20alors%20l%27ouverture%20de%20l%27espace-temps%20ce%20qui%20ferait%20jaillir%0D%0Aune%20%E9nergie%20absolument%20colossale.%3C%2Fp%3E%3Cp%3EBref%2C%20il%20reste%20pas%20mal%20de%20points%0D%0Aobscurs%20%28Arf%20%21%29%20concernant%20ces%20%E9nigmatiques%20trous%20noirs...%3C%2Fp%3E%0D%0A%0D%0A%3Cp%3EPour%20terminer%2C%20cette%20histoire%20de%20densit%E9%20infinie%20est%20de%20la%20foutaise.%20Dans%20ce%0D%0Amonde%20o%F9%20tout%20a%20un%20poids%2C%20ou%20une%20mesure%2C%20une%20forme%2C%20une%20couleur%2C%20etc.%2C%20o%F9%20tout%0D%0Aest%20limit%E9%2C%20avoir%20quelque%20chose%20qui%20soit%20infini%20est%20un%20non%20sens.%20D%27ailleurs%2C%20le%0D%0Afait%20m%EAme%20que%20les%20noyaux%20des%20trous%20noirs%20aient%20un%20diam%E8tre%20qui%20varie%20indique%0D%0Aplut%F4t%20quie%20l%27effondrement%20gravitationnel%20a%20une%20limite%20%28sinon%20ils%0D%0Aauraient%20tous%3Cfont%20color%3D%22%23FF0000%22%20face%3D%22arial%22%20size%3D%225%22%3E%3Cspan%20style%3D%22background-color%3A%20%23FFFFCC%22%3E%3Cb%3E%20%5B...%5D%3C%2Fb%3E%3C%2Fspan%3E%3C%2Ffont%3E
|
• |
"Pleins feux sur les trous noirs" par Éric Gourgoulhon dans la catégorie "Science & Technologie" |
%3Cp%20align%3D%22justify%22%3ECette%20vid%E9o%20est%26nbsp%3Bun%20film%20documentaire%20de%26nbsp%3B2009%20de%20Richard%20Burke-Ward%0D%0Asur%20les%20trous%20noirs.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3E%3Cu%3E%3Cfont%20size%3D%225%22%3ESynopsis%20%3A%3C%2Ffont%3E%3C%2Fu%3E%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3ELe%20danger%20des%20ast%E9ro%EFdes%20pouvant%20d%E9truire%20la%20vie%20sur%20Terre%20n%27est%20rien%2C%20compar%E9%20au%20danger%20des%20trous%20noirs%20qui%20d%E9truisent%20tout%20simplement%20toute%20mati%E8re%20et%20lumi%E8re.%0D%0ACes%20monstres%20aux%20proportions%20inimaginables%20engloutissent%20des%20%E9toiles%20enti%E8res.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3ED%27o%F9%20viennent-ils%20%3F%20Comment%20se%20forment-ils%20%3F%20A%20quelles%20lois%20ob%E9issent-ils%20%3F%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3EUn%20%E9pisode%20entier%20est%20consacr%E9%20au%20myst%E8re%20des%20trous%20noirs%20trait%E9s%20comme%20les%20monstres%20de%20l%27espace.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3ELes%20tournages%20ont%20lieu%20dans%20des%20observatoires%20pointus.%20La%20difficult%E9%20est%20d%27imaginer%20quelque%20chose%20d%27invisible%20capable%20de%20d%E9vorer%20une%20masse%20illimit%E9e%20de%20mati%E8re%20et%20d%27%E9nergie.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3ELe%20professeur%20Boyle%20a%20r%E9ussi%20%E0%20observer%20la%20disparition%20d%27un%20objet%20c%E9leste%20par%20un%20trou%20noir.%20Pour%20autant%2C%20ces%20ph%E9nom%E8nes%20sont%20impossibles%20%E0%20localiser%20sinon%20en%20identifiant%20les%20%E9toiles%20en%20fin%20de%20vie.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3EDans%20cet%20%E9pisode%20le%20mod%E9lisateur%203D%20de%20Sam%20Neill%20est%20particuli%E8rement%20spectaculaire%20et%20permet%20de%20comprendre%20ce%20qu%27est%20une%20%E9toile%20qui%20s%27effondre%20sur%20elle-m%EAme.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%20style%3D%22margin-left%3A%2020%22%3ESource%20%3A%26nbsp%3B%3Ca%20href%3D%22http%3A%2F%2Fvideos.arte.tv%2Ffr%2Fvideos%2Fles_mysteres_du_cosmos-4094258.html%22%20target%3D%22_blank%22%3EArte%3C%2Fa%3E%20%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29.%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22justify%22%3EUne%20vid%E9o%20id%E9ale%2C%20expliquant%20simplement%20les%20choses%2C%20pour%20s%27initier%20%E0%20ces%20monstres%20si%20particuliers%20et%20fascinants.%3C%2Fp%3E
|
• |
"Les mystères du cosmos - Les trous noirs" dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%20passionnante%20vous%20permettra%20de%20comprendre%20le%20r%F4le%20inattendu%20des%20trous%20noirs%2C%20leur%20danger%2C%20et%20de%20saisir%20intuitivement%20comment%20notre%20galaxie%20et%20tout%20l%27Univers%20vont%20se%20terminer.%20Effrayant.%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%201%20%3A%20merci%20%E0%20mon%20ami%20%26quot%3B%3Ci%3E%3Cfont%20color%3D%22%23FF0000%22%3ELastH%40pe%3C%2Ffont%3E%3C%2Fi%3E%26quot%3B%0D%0Apour%20sa%20super%20traduction%20b%E9n%E9vole%20en%20faveur%20de%20l%27Humanit%E9%20francophone.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%202%20%3A%20une%20deuxi%E8me%20version%20de%20ce%20documentaire%2C%20plus%20longue%20et%20%0D%0Aencore%20plus%20passionnante%2C%20peut%20%EAtre%20vue%20%E9galement%20sur%20ce%20site%2C%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3FNumVideo%3D6114%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%3E%3Cb%3ENota%20Bene%203%20%3A%20pour%20obtenir%20la%20liste%20de%20toutes%20les%20vid%E9os%20sur%20le%20th%E8me%20des%20trous%20noirs%2C%20%0D%0Adisponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrou%2520noir%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E%20puis%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrous%2520noirs%26mode%3Dliste%22%3E%0D%0A%5Bl%E0%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E%0D%0A%3Cp%20align%3D%22center%22%3E%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FExclusivite%2520mondiale%2520BlueMan%2520-%2520SANS%2520RECOPIE.jpg%22%20width%3D%22850%22%20height%3D%22150%22%3E%3C%2Fp%3E
|
• |
"Les plus grands trous noirs dans l'univers" - Version 1 dans la catégorie "Science & Technologie" |
L%27un%20des%20meilleurs%20documentaires%20sur%20les%20trous%20noirs%2C%20et%20m%EAme%20un%20peu%20effrayant.%20%C0%20voir%20%21%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20pour%20obtenir%20la%20liste%20de%20toutes%20les%20vid%E9os%20sur%20le%20th%E8me%20des%20trous%20noirs%2C%20%0D%0Adisponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrou%2520noir%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E%20puis%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrous%2520noirs%26mode%3Dliste%22%3E%0D%0A%5Bl%E0%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Les clés de l'Univers - Épisode 2 - Trous noirs" dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%2C%20en%205%20parties%2C%20est%20un%20excellent%20documentaire%20pour%20mieux%20comprendre%20les%20trous%20noirs%2C%20comment%20on%20les%20a%20d%E9couvert%2C%20et%20leurs%20principales%20caract%E9ristiques.%20Passionnant%20%21%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20pour%20obtenir%20la%20liste%20de%20toutes%20les%20vid%E9os%20sur%20le%20th%E8me%20des%20trous%20noirs%2C%20%0D%0Adisponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrou%2520noir%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E%20puis%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrous%2520noirs%26mode%3Dliste%22%3E%0D%0A%5Bl%E0%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Au delà des trous noirs" dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%20est%20un%20documentaire%20scientifique%20du%20%26quot%3B%3Ci%3ENational%20Geographic%3C%2Fi%3E%26quot%3B%0D%0Asur%20les%20%E9nigmatiques%20trous%20noirs%2C%20ces%20v%E9ritables%20monstres%20des%20galaxies.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0APlusieurs%20%E9quipes%2C%20l%27une%20am%E9ricaine%2C%20l%27autre%20allemande%2C%20s%27affrontent%20pour%0D%0Ad%E9terminer%20si%20le%20centre%20de%20notre%20galaxie%2C%20la%20%26quot%3B%3Ci%3EVoie%20Lact%E9e%3C%2Fi%3E%26quot%3B%2C%0D%0Aest%20un%20trou%20noir.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AAu%20travers%20de%20des%20exp%E9riences%20qu%27ils%20m%E8nent%2C%20le%20documentaire%20nous%20fait%0D%0Ad%E9couvrir%20l%27univers%20des%20trous%20noirs%2C%20et%20notamment%20les%20diff%E9rents%20ph%E9nom%E8nes%0D%0Aet%20l%27impact%20incroyables%20qu%27ils%20g%E9n%E8rent.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AEt%20pour%20la%20premi%E8re%20fois%2C%20des%20scientifiques%20vont%20parvenir%20%E0%20%26quot%3Bvoir%26quot%3B%20ce%20qu%27il%20y%20a%20%E0%20l%27int%E9rieur%20d%27un%20trou%0D%0Anoir%2C%20gr%E2ce%20%E0%20une%20simulation%20informatique%20visuelle%20mettant%20en%20oeuvre%20les%0D%0A%E9quations%20d%27Einstein.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0APlus%20%E9tonnant%20encore%20%3A%20plus%20l%27on%20se%20rapproche%20du%20centre%20de%20la%20galaxie%2C%20plus%20on%0D%0Atrouve%20de%20trous%20noirs...%3Cbr%3E%0D%0AEt%20sur%20les%20125%20milliards%20de%20galaxies%20qui%20composent%20l%27Univers%20visibles%2C%20plus%20d%27un%0D%0Amillion%20ont%20d%E9j%E0%20%E9t%E9%20%26quot%3Banalys%E9es%26quot%3B.%20Et%20vous%20savez%20quoi%20%3F%20La%20plus%0D%0Avaste%20majorit%E9%20d%27entre%20elles%20portent%20la%20marque%20d%27un%20trou%20noir%20hyper-massif%20en%0D%0Aleur%20centre...%20De%20l%E0%20%E0%20penser%20que%20toutes%20les%20galaxies%20abritent%20en%20leur%20centre%0D%0Aun%20trou%20noir%2C%20il%20n%27y%20a%20qu%27un%20pas.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0A%26quot%3B%3Ci%3EUn%20trou%20noir%20est%20un%20objet%20astrophysique%20comme%20un%20autre.%20Il%20se%20caract%E9rise%20par%20le%20fait%20qu%92il%20est%20tr%E8s%20difficile%20%E0%20observer%20directement%20%28voir%20ci-dessous%29%2C%20et%20que%20sa%20r%E9gion%20centrale%20ne%20peut%20%EAtre%20d%E9crite%20de%20fa%E7on%20satisfaisante%20par%20les%20th%E9ories%20physiques%20en%20leur%20%E9tat%20du%20d%E9but%20du%20XXIe%20si%E8cle%2C%20car%20elle%20abrite%20une%20singularit%E9%20gravitationnelle.%20Cette%20derni%E8re%20ne%20peut%20%EAtre%20d%E9crite%20que%20dans%20le%20cadre%20d%92une%20th%E9orie%20de%20la%20gravitation%20quantique%2C%20manquante%20%E0%20ce%20jour.%20Par%20contre%2C%20on%20sait%20parfaitement%20d%E9crire%20les%20conditions%20physiques%20qui%20r%E8gnent%20dans%20son%20voisinage%20imm%E9diat%2C%20de%20m%EAme%20que%20son%20influence%20sur%20son%20environnement%2C%20ce%20qui%20permet%20de%20les%20d%E9tecter%20par%20diverses%20m%E9thodes%20indirectes.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0APar%20ailleurs%2C%20les%20trous%20noirs%20sont%20%E9tonnants%20en%20ce%20qu%92ils%20sont%20d%E9crits%20par%20un%20tr%E8s%20petit%20nombre%20de%20param%E8tres.%20En%20effet%2C%20leur%20description%2C%20dans%20l%92univers%20dans%20lequel%20nous%20vivons%2C%20ne%20d%E9pend%20que%20de%20trois%20param%E8tres%20%3A%20la%20masse%2C%20la%20charge%20%E9lectrique%20et%20le%20moment%20cin%E9tique.%20Tous%20les%20autres%20param%E8tres%20du%20trou%20noir%20%28par%20exemple%20sa%20taille%20ou%20sa%20forme%29%20sont%20fix%E9s%20par%20ceux-l%E0.%20Par%20comparaison%2C%20la%20description%20d%92une%20plan%E8te%20fait%20intervenir%20des%20centaines%20de%20param%E8tres%20%28composition%20chimique%2C%20diff%E9renciation%20de%20ses%20%E9l%E9ments%2C%20convection%2C%20atmosph%E8re%2C%20etc.%29.%20La%20raison%20pour%20laquelle%20un%20trou%20noir%20n%92est%20d%E9crit%20que%20par%20ces%20trois%20param%E8tres%20est%20connue%20depuis%201967%20%3A%0D%0Ac%92est%20le%20th%E9or%E8me%20de%20calvitie%20d%E9montr%E9%20par%20Werner%20Israel.%20Celui-ci%20explique%20que%20les%20seules%20interactions%20fondamentales%20%E0%20longue%20port%E9e%20%E9tant%20la%20gravitation%20et%20l%92%E9lectromagn%E9tisme%2C%20les%20seules%20propri%E9t%E9s%20mesurables%20des%20trous%20noirs%20sont%20donn%E9es%20par%20les%20param%E8tres%20d%E9crivant%20ces%20interactions%2C%20%E0%20savoir%20la%20masse%2C%20le%20moment%20cin%E9tique%20et%20la%20charge%20%E9lectrique.%3Cbr%3E%0D%0APour%20un%20trou%20noir%2C%20la%20masse%20et%20la%20charge%20%E9lectrique%20sont%20des%20propri%E9t%E9s%20habituelles%20que%20d%E9crit%20la%20physique%20classique%20%28c%27est-%E0-dire%20non-relativiste%29%20%3A%20le%20trou%20noir%20poss%E8de%20un%20champ%20gravitationnel%20proportionnel%20%E0%20sa%20masse%20et%20un%20champ%20%E9lectrique%20proportionnel%20%E0%20sa%20charge.%20L%27influence%20du%20moment%20cin%E9tique%20est%20par%20contre%20sp%E9cifique%20%E0%20la%20relativit%E9%20g%E9n%E9rale.%20Celle-l%E0%20stipule%20en%20effet%20qu%27un%20corps%20en%20rotation%20va%20avoir%20tendance%20%E0%20%AB%20entra%EEner%20%BB%20l%27espace-temps%20dans%20son%20voisinage.%3C%2Fi%3E%26quot%3B%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ASource%20%3A%20%3Ca%20href%3D%22http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FTrou_noir%22%20target%3D%22_blank%22%3Ehttp%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FTrou_noir%3C%2Fa%3E%0D%0A%28%3Cimg%20border%3D%220%22%20src%3D%22IMAGES%2FNouvelle%2520Fenetre%252025x25.jpg%22%20align%3D%22absmiddle%22%20width%3D%2225%22%20height%3D%2225%22%3E%29%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AUn%20documentaire%20de%20premi%E8re%20qualit%E9%2C%20tr%E8s%20graphique%2C%20et%20absolument%0D%0Apassionnant.%20Un%20must.%0D%0A%3Cp%20align%3D%22justify%22%3E%3Cb%3ENota%20Bene%20%3A%20pour%20un%20meilleur%20confort%20auditif%2C%20j%27ai%20rehauss%E9%20le%20son%20de%20cette%20vid%E9o%20de%205%20dB.%3C%2Fb%3E%3C%2Fp%3E
Must
|
• |
"Monstres de la galaxie" : les trous noirs dans la catégorie "Science & Technologie" |
%3Cimg%20border%3D%221%22%20src%3D%22IMAGES%2FStephen%2520Hawking.jpg%22%20align%3D%22left%22%20hspace%3D%2220%22%20vspace%3D%225%22%20width%3D%22300%22%20height%3D%22391%22%3ECette%20vid%E9o%2C%20en%203%20parties%2C%20est%20un%20reportage%20sur%0D%0Al%27univers%20du%20fameux%20physicien%20th%E9oricien%20et%20cosmologiste%20anglais%20Stephen%20Hawking%0D%0A%3A%20les%20trous%20noirs%2C%20auxquels%20il%20a%20consacr%E9%20une%20majeure%20partie%20de%20ses%20recherches.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ACe%20documentaire%20nous%20raconte%20l%27histoire%20fabuleuse%20des%20trous%20noir%20depuis%20leur%20d%E9couverte%20th%E9orique%0D%0Ajusqu%27%E0%20leur%20observation%20indirecte%2C%20gr%E2ce%20notamment%20aux%20ph%E9nom%E8nes%20bizarres%20qu%27ils%0D%0Aengendrent%20dans%20leur%20voisinage.%3Cbr%3E%3Cbr%3EUn%20trou%20noir%20poss%E8de%20toujours%20une%20masse%20non%20nulle.%20En%20revanche%2C%20ses%20deux%20autres%20caract%E9ristiques%2C%20%E0%20savoir%20le%20moment%20cin%E9tique%20%28rotation%29%20et%20la%20charge%20%E9lectrique%2C%20peuvent%20en%20principe%20prendre%20des%20valeurs%20nulles%20%28c%92est-%E0-dire%20%E9gales%20%E0%20z%E9ro%29%20ou%20non%20nulles.%20La%20combinaison%20de%20ces%20%E9tats%20permet%20de%20d%E9finir%20quatre%20types%20de%20trous%20noirs.%3Cbr%3E%3Cbr%3EQuand%20la%20charge%20%E9lectrique%20et%20le%20moment%20cin%E9tique%20sont%20nuls%2C%20on%20parle%20de%20trou%20noir%20de%20Schwarzschild%2C%20du%20nom%20de%20Karl%20Schwarzschild%20qui%2C%20le%20premier%2C%20a%20mis%20en%20%E9vidence%20ces%20objets%20comme%20solutions%20des%20%E9quations%20de%20la%20relativit%E9%20g%E9n%E9rale%20%28les%20%E9quations%20d%27Einstein%29%2C%20en%201916.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AQuand%20la%20charge%20%E9lectrique%20est%20non%20nulle%20et%20le%20moment%20cin%E9tique%20nul%2C%20on%20parle%0D%0Ade%20trou%20noir%20de%20Reissner-Nordstr%F6m.%20Ces%20trous%20noirs%20ne%20pr%E9sentent%20pas%20d%92int%E9r%EAt%0D%0Aastrophysique%20notable%2C%20car%20aucun%20processus%20connu%20ne%20permet%20de%20fabriquer%20un%20objet%0D%0Acompact%20conservant%20durablement%20une%20charge%20%E9lectrique%20significative%20%3B%20celle-ci%0D%0Ase%20dissipe%20normalement%20rapidement%20par%20absorption%20de%20charges%20%E9lectriques%20oppos%E9es%0D%0Aprises%20%E0%20son%20environnement.%20Un%20trou%20noir%20de%20Reissner-Nordstr%F6m%20est%20donc%20un%0D%0Aobjet%20th%E9orique%20tr%E8s%20improbable%20dans%20la%20nature.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0ASi%20le%20trou%20noir%20poss%E8de%20un%20moment%20cin%E9tique%20%28c%92est-%E0-dire%20qu%92il%20est%20en%0D%0Arotation%20sur%20lui-m%EAme%29%20mais%20n%92a%20pas%20de%20charge%20%E9lectrique%2C%20on%20parle%20de%20trou%0D%0Anoir%20de%20Kerr%2C%20du%20nom%20du%20math%E9maticien%20n%E9o-z%E9landais%20Roy%20Kerr%20qui%20a%20trouv%E9%20la%0D%0Aformule%20d%E9crivant%20ces%20objets%20en%201963.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AContrairement%20aux%20trous%20noirs%20de%20Reissner-Nordstr%F6m%20et%20de%20Schwarzschild%2C%20les%0D%0Atrous%20noirs%20de%20Kerr%20pr%E9sentent%20un%20int%E9r%EAt%20astrophysique%20consid%E9rable%2C%20car%0D%0Ales%20mod%E8les%20de%20formation%20et%20d%92%E9volution%20des%20trous%20noirs%20indiquent%20que%0D%0Aceux-ci%20ont%20tendance%20%E0%20absorber%20la%20mati%E8re%20environnante%20par%20l%92interm%E9diaire%0D%0Ad%92un%20disque%20d%27accr%E9tion%20dans%20lequel%20la%20mati%E8re%20tombe%20dans%20le%20trou%20noir%2C%0D%0Aselon%20une%20spirale%20toujours%20dans%20le%20m%EAme%20sens.%20Ainsi%2C%20la%20mati%E8re%20communique%20du%0D%0Amoment%20cin%E9tique%20au%20trou%20noir%20qui%20l%92engloutit.%20Les%20trous%20noirs%20de%20Kerr%20sont%0D%0Adonc%20les%20seuls%20que%20l%92on%20s%92attend%20r%E9ellement%20%E0%20rencontrer%20en%20astronomie.%0D%0ACependant%2C%20il%20reste%20possible%20que%20des%20trous%20noirs%20%E0%20moment%20cin%E9tique%20tr%E8s%0D%0Afaible%2C%20s%92apparentant%20en%20pratique%20%E0%20des%20trous%20noirs%20de%20Schwarzschild%2C%0D%0Aexistent.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0AUn%20documentaire%20de%20toute%20premi%E8re%20qualit%E9%2C%20bien%20didactique.%20%C0%20voir.%3Cbr%3E%0D%0A%3Cbr%3E%0D%0A%3Cb%3ENota%20Bene%20%3A%20le%20format%20inusuel%20et%20d%E9form%E9%20de%20cette%20vid%E9o%20est%0D%0A%26quot%3Bnormal%26quot%3B%2C%20compte%20tenu%20des%20param%E8tres%20d%E9finis%20sur%20le%20serveur%0D%0Ad%27origine.%3C%2Fb%3E
|
• |
"L'univers de Stephen Hawking : Au delà des trous noirs" dans la catégorie "Science & Technologie" |
Cette%20vid%E9o%20est%20un%20documentaire%20r%E9alis%E9%20par%20un%20amateur%20sur%20les%20plus%20gros%20trous%20noirs%20de%20l%27Univers.%3Cbr%3E%3Cbr%3EOn%20ne%20les%20a%20jamais%20directement%20vus%2C%20pourtant%20nous%20savons%20qu%92ils%20sont%20l%E0%2C%20r%F4dant%20au%20milieu%20de%20denses%20amas%20d%92%E9toiles%2C%20ou%20errant%20dans%20les%20n%E9buleuses%20de%20la%20galaxie%2C%20o%F9%20ils%20chassent%20les%20%E9toiles%2C%20ou%20avalent%20des%20plan%E8tes%20enti%E8res%20%3A%20ce%20sont%20les%20plus%20gros%20trous%20noirs%20de%20l%27Univers.%3Cbr%3E%3Cbr%3EUn%20bon%20petit%20documentaire%20bien%20fait%20sur%20ces%20%E9nignatiques%20et%20fascinants%20objets%20que%20sont%20les%20trous%20noirs.%3Cp%3E%3Cb%3ENota%20Bene%20%3A%20pour%20obtenir%20la%20liste%20de%20toutes%20les%20vid%E9os%20sur%20le%20th%E8me%20des%20trous%20noirs%2C%20%0D%0Adisponibles%20sur%20ce%20site%2C%20cliquez%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrou%2520noir%26mode%3Dliste%22%3E%0D%0A%5Bici%5D%3C%2Fa%3E%20puis%0D%0A%3Ca%20href%3D%22https%3A%2F%2Fwww.blueman.name%2FDes_Videos_Remarquables.php%3Ftitre%3Dtrous%2520noirs%26mode%3Dliste%22%3E%0D%0A%5Bl%E0%5D%3C%2Fa%3E.%3C%2Fb%3E%3C%2Fp%3E
|
• |
"Les plus gros trous noirs de l'Univers" dans la catégorie "Science & Technologie" |