{"id":2379,"date":"2020-05-08T14:02:07","date_gmt":"2020-05-08T12:02:07","guid":{"rendered":"http:\/\/www.rouillier.com\/wordpress-philopsycho\/?p=2379"},"modified":"2020-05-08T14:03:17","modified_gmt":"2020-05-08T12:03:17","slug":"du-big-bang-aux-trous-noirs","status":"publish","type":"post","link":"https:\/\/www.rouillier.com\/wordpress-philopsycho\/du-big-bang-aux-trous-noirs\/","title":{"rendered":"Du big bang aux trous noirs"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ce que je vais vous raconter est bien s\u00fbr une histoire, un conte philosophique, qui se pare d\u2019effets scientifiques mais ne pr\u00e9sente aucune cr\u00e9dibilit\u00e9. \u2026 pourtant on a souvent vu les histoires de science-fiction s\u2019av\u00e9rer, avec le temps, pas si sottes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans la th\u00e9orie de la relativit\u00e9 d\u2019Einstein toute entit\u00e9 massive d\u00e9forme l\u2019espace-temps (originellement plat) et cette courbure influence le trajet des autres corps en mouvement qui passent \u00e0 sa port\u00e9e. D\u2019une trajectoire lin\u00e9aire elle leur donne une trajectoire incurv\u00e9e. Si cette inflexion est suffisamment forte les corps moins massifs finissent par tourner autour des corps plus massifs. Lorsque les corps en rotation se heurtent, ils peuvent fusionner pour donner une entit\u00e9 encore plus massive et surtout plus dense.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A force de fusionner et de se densifier les entit\u00e9s c\u00e9lestes finissent par cr\u00e9er ce que l\u2019on appelle des \u00ab\u00a0trous noirs\u00a0\u00bb. C\u2019est un point de l\u2019univers ou la mati\u00e8re (ou l\u2019\u00e9nergie) est si forte et si concentr\u00e9e qu\u2019elle cr\u00e9e une intense d\u00e9formation de l\u2019espace-temps. Cette d\u00e9formation est si intense que les corps qui gravitent dans son voisinage ne vont pas seulement tourner autour du trou noir, mais \u00eatre carr\u00e9ment absorb\u00e9 par lui, comme dans un vortex, pour venir fusionner avec la mati\u00e8re pr\u00e9sente et cr\u00e9er un trou noir encore plus intense et actif<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un trou noir de forte intensit\u00e9 peut m\u00eame absorber de plus petits trous noirs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Progressivement les trous noirs absorbent toute la mati\u00e8re, puis les plus gros trous noirs absorbent les plus petit, jusqu\u2019\u00e0 ce que tout l\u2019univers se concentre en un seul point, un seul \u00e9norme trou noir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On obtient alors les conditions initiales du Big Bang ou toute la mati\u00e8re de l\u2019univers est concentr\u00e9e en un seul point. Le Big bang peut alors se produire, exploser, former l\u2019univers c\u00e9leste en expansion, les syst\u00e8mes de galaxies et les syst\u00e8mes solaires, puis les trous noirs, puis le grand trou noir, puis encore le Big Bang.et ainsi\u00a0 de suite.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Voil\u00e0 un univers sans d\u00e9but ni fin, en perp\u00e9tuel renouvellement, et qui respecte (ou peu s\u2019en faut) les r\u00e8gles de la relativit\u00e9. L\u2019univers en extension fini par se retrouver concentr\u00e9 en un point, pr\u00eat \u00e0 s\u2019\u00e9tendre de nouveau, dans une succession d&rsquo;explosions et de concentrations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9videmment tout ceci est une fable, un conte, mais qu\u2019importe pourvu qu\u2019il nous entra\u00eene dans un univers ou tout s\u2019explique sans avoir besoin ni de dieu, des hommes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Emmener moi au pays de merveilles&nbsp;!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ce que je vais vous raconter est bien s\u00fbr une histoire, un conte philosophique, qui se pare d\u2019effets scientifiques mais ne pr\u00e9sente aucune cr\u00e9dibilit\u00e9. \u2026 pourtant on a souvent vu les histoires de science-fiction s\u2019av\u00e9rer, avec le temps, pas si sottes. Dans la th\u00e9orie de la relativit\u00e9 d\u2019Einstein toute entit\u00e9 massive d\u00e9forme l\u2019espace-temps (originellement plat) [&hellip;]<\/p>\n","protected":false},"author":256,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[344,343],"class_list":["post-2379","post","type-post","status-publish","format-standard","hentry","category-philo","tag-big-babg","tag-big-bang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Du big bang aux trous noirs -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rouillier.com\/wordpress-philopsycho\/du-big-bang-aux-trous-noirs\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Du big bang aux trous noirs -\" \/>\n<meta property=\"og:description\" content=\"Ce que je vais vous raconter est bien s\u00fbr une histoire, un conte philosophique, qui se pare d\u2019effets scientifiques mais ne pr\u00e9sente aucune cr\u00e9dibilit\u00e9. \u2026 pourtant on a souvent vu les histoires de science-fiction s\u2019av\u00e9rer, avec le temps, pas si sottes. 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