{"id":3475,"date":"2015-09-01T04:48:09","date_gmt":"2015-09-01T04:48:09","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=3475"},"modified":"2015-09-09T05:08:56","modified_gmt":"2015-09-09T05:08:56","slug":"en-video-lacceleration-de-lexpansion-de-lunivers","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/","title":{"rendered":"En vid\u00e9o : l&#8217;acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers"},"content":{"rendered":"<p><strong>L&#8217;astrophysicien Jean-Pierre Luminet revient sur l&#8217;acc\u00e9l\u00e9ration de l&#8217;expansion de l&#8217;Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.<\/strong><\/p>\n<p>Jusqu&#8217;au d\u00e9but du XXe si\u00e8cle, les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" target=\"_blank\">astronomes<\/a> classaient comme <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/30\/la-nebuleuse-du-crabe-premier-objet-messier\/\" target=\"_blank\">n\u00e9buleuses <\/a>tous les objets diffus qu&#8217;ils observaient dans leurs <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/14\/en-images-les-telescopes-amateurs\/\" target=\"_blank\">t\u00e9lescopes<\/a>, sans pouvoir d\u00e9terminer si ces objets c\u00e9lestes se situaient \u00e0 l&#8217;int\u00e9rieur ou \u00e0 l&#8217;ext\u00e9rieur de la<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/08\/05\/voie-lactee-chateau\/\" target=\"_blank\"> Voie lact\u00e9e<\/a>.<\/p>\n<p>La r\u00e9ponse fut donn\u00e9e par <a href=\"https:\/\/blogs.futura-sciences.com\/luminet\/2014\/11\/30\/hubble\/\" target=\"_blank\">Edwin Hubble<\/a> \u00a0en 1925 quand il d\u00e9couvrit la nature extragalactique de la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/29\/la-galaxie-dandromede-se-leve-sur-les-apennins\/\" target=\"_blank\">galaxie d&#8217;Androm\u00e8de<\/a> dont il mesura la distance en y observant des \u00e9toiles particuli\u00e8res, les <a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-nouvelles-cepheides-mesurer-univers-19660\/\" target=\"_blank\">C\u00e9ph\u00e9ides<\/a>, \u00e0 l&#8217;aide d&#8217;un t\u00e9lescope de 2,5 m\u00e8tres de diam\u00e8tre.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x2aqajm\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>Quelques ann\u00e9es plus tard, en s&#8217;appuyant sur les th\u00e9ories du physicien <a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-lemaitre-bien-laisse-decouverte-constante-hubble-hubble-34569\/\" target=\"_blank\">Georges Lema\u00eetre<\/a>, \u00a0Hubble prouva que l&#8217;Univers \u00a0est en expansion.<\/p>\n<p><!--more-->Cette expansion devrait normalement \u00eatre frein\u00e9e au fil du temps par la gravit\u00e9 qui est une force attractive. C&#8217;est ce ralentissement que les \u00e9quipes de\u00a0Saul Perlmutter et Adam Riess ont voulu mesurer en 1998. Les chercheurs ont eu la surprise de d\u00e9couvrir que l&#8217;expansion de l&#8217;Univers s&#8217;acc\u00e9l\u00e9rait. Pour expliquer l&#8217;origine de cette acc\u00e9l\u00e9ration, les astrophysiciens ont alors imagin\u00e9 l&#8217;existence d&#8217;une nouvelle forme d&#8217;\u00e9nergie appel\u00e9e <a href=\"http:\/\/www.futura-sciences.com\/magazines\/matiere\/infos\/actu\/d\/physique-energie-noire-pourrait-devenir-mythique-energie-libre-portee-main-53076\/\" target=\"_blank\">\u00e9nergie noire<\/a> (ou \u00e9nergie sombre) dont la nature est encore inconnue.<\/p>\n<p>Pour l&#8217;astrophysicien <a href=\"https:\/\/blogs.futura-sciences.com\/luminet\/\" target=\"_blank\">Jean-Pierre Luminet<\/a>, l&#8217;acc\u00e9l\u00e9ration de l&#8217;expansion de l&#8217;Univers pourrait bien \u00eatre la plus grande d\u00e9couverte de l&#8217;histoire de l&#8217;astronomie.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>L&#8217;astrophysicien Jean-Pierre Luminet revient sur l&#8217;acc\u00e9l\u00e9ration de l&#8217;expansion de l&#8217;Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux. Jusqu&#8217;au d\u00e9but du XXe si\u00e8cle, les astronomes classaient comme n\u00e9buleuses tous les objets diffus qu&#8217;ils observaient dans leurs t\u00e9lescopes, sans pouvoir d\u00e9terminer si ces objets c\u00e9lestes se situaient \u00e0 l&#8217;int\u00e9rieur ou \u00e0 l&#8217;ext\u00e9rieur de la Voie lact\u00e9e. &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">En vid\u00e9o : l&#8217;acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":3479,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[836,740,1215,112,330,1214,1216,476],"class_list":["post-3475","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-cepheide","tag-edwin-powell-hubble","tag-energie-noire","tag-galaxie","tag-galaxie-dandromede","tag-georges-lemaitre","tag-jean-pierre-luminet","tag-univers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>En vid\u00e9o : l&#039;acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers<\/title>\n<meta name=\"description\" content=\"L&#039;astrophysicien Jean-Pierre Luminet revient sur l&#039;acc\u00e9l\u00e9ration de l&#039;expansion de l&#039;Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"En vid\u00e9o : l&#039;acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers\" \/>\n<meta property=\"og:description\" content=\"L&#039;astrophysicien Jean-Pierre Luminet revient sur l&#039;acc\u00e9l\u00e9ration de l&#039;expansion de l&#039;Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2015-09-01T04:48:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-09-09T05:08:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"886\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\",\"name\":\"En vid\u00e9o : l'acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg\",\"datePublished\":\"2015-09-01T04:48:09+00:00\",\"dateModified\":\"2015-09-09T05:08:56+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"description\":\"L'astrophysicien Jean-Pierre Luminet revient sur l'acc\u00e9l\u00e9ration de l'expansion de l'Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg\",\"width\":1000,\"height\":886},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\",\"name\":\"Jean-Baptiste FELDMANN\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"caption\":\"Jean-Baptiste FELDMANN\"},\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"En vid\u00e9o : l'acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers","description":"L'astrophysicien Jean-Pierre Luminet revient sur l'acc\u00e9l\u00e9ration de l'expansion de l'Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/","og_locale":"fr_FR","og_type":"article","og_title":"En vid\u00e9o : l'acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers","og_description":"L'astrophysicien Jean-Pierre Luminet revient sur l'acc\u00e9l\u00e9ration de l'expansion de l'Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2015-09-01T04:48:09+00:00","article_modified_time":"2015-09-09T05:08:56+00:00","og_image":[{"width":1000,"height":886,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg","type":"image\/jpeg"}],"author":"Jean-Baptiste FELDMANN","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Jean-Baptiste FELDMANN","Dur\u00e9e de lecture estim\u00e9e":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/","name":"En vid\u00e9o : l'acc\u00e9l\u00e9ration de l\u2019expansion de l\u2019Univers","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg","datePublished":"2015-09-01T04:48:09+00:00","dateModified":"2015-09-09T05:08:56+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"description":"L'astrophysicien Jean-Pierre Luminet revient sur l'acc\u00e9l\u00e9ration de l'expansion de l'Univers, la plus importante d\u00e9couverte astronomique \u00e0 ses yeux.","inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/01\/en-video-lacceleration-de-lexpansion-de-lunivers\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/08\/galaxies.jpg","width":1000,"height":886},{"@type":"WebSite","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/","name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","description":"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea","name":"Jean-Baptiste FELDMANN","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","caption":"Jean-Baptiste FELDMANN"},"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/3475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/comments?post=3475"}],"version-history":[{"count":4,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/3475\/revisions"}],"predecessor-version":[{"id":3480,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/3475\/revisions\/3480"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/3479"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=3475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=3475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=3475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}