{"id":1762,"date":"2015-02-05T08:31:18","date_gmt":"2015-02-05T08:31:18","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1762"},"modified":"2015-02-11T06:18:40","modified_gmt":"2015-02-11T06:18:40","slug":"deux-bulles-de-gaz-geantes-autour-de-la-voie-lactee","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/05\/deux-bulles-de-gaz-geantes-autour-de-la-voie-lactee\/","title":{"rendered":"Deux bulles de gaz g\u00e9antes autour de la Voie lact\u00e9e"},"content":{"rendered":"<p>Le t\u00e9lescope am\u00e9ricain <a title=\"Le t\u00e9lescope Fermi confirme l'\u00e9nigme des positrons cosmiques\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-telescope-fermi-confirme-enigme-positrons-cosmiques-33562\/\" target=\"_blank\">Fermi<\/a> a confirm\u00e9 ce que les <a title=\"Lumi\u00e8re rouge pour les astronomes\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" target=\"_blank\">astronomes <\/a>soup\u00e7onnaient d\u00e9j\u00e0\u00a0: il existe une gigantesque double bulle de gaz chauds de part et d&#8217;autre de notre galaxie, la <a title=\"La Voie lact\u00e9e et le ch\u00e2teau\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/08\/05\/voie-lactee-chateau\/\" target=\"_blank\">Voie lact\u00e9e<\/a>.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/bulles-fermi.jpg\" rel=\"lightbox[1762]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1763\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/bulles-fermi-450x337.jpg\" alt=\"bulles-fermi\" width=\"450\" height=\"337\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/bulles-fermi-450x337.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/bulles-fermi-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/01\/bulles-fermi.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les chercheurs proposent deux th\u00e9ories pour expliquer la pr\u00e9sence de ces bulles (beaucoup plus discr\u00e8tes que sur la vue d&#8217;artiste ci-dessus).<\/p>\n<p><!--more-->Elles proviennent soit de l&#8217;explosion de plusieurs grosses <a title=\"Des milliards d\u2019\u00e9toiles\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/28\/milliards-detoiles\/\" target=\"_blank\">\u00e9toiles <\/a>en fin de vie, soit de rejets gazeux \u00e9chapp\u00e9s du <a title=\"Zoom sur le trou noir de notre galaxie\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-zoom-trou-noir-notre-galaxie-17624\/\" target=\"_blank\">trou noir<\/a> tapis au centre de notre galaxie.<\/p>\n<p>Pour en savoir plus sur ces bulles, les astronomes ont utilis\u00e9 le <a title=\"Le t\u00e9lescope Hubble zoome sur la galaxie d\u2019Androm\u00e8de\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/09\/le-telescope-hubble-zoome-sur-la-galaxie-d-andromede\/\" target=\"_blank\">t\u00e9lescope spatial Hubble<\/a>. Ils ont point\u00e9 un <a title=\"D\u00e9finition d'un quasar\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/dico\/d\/astronomie-quasar-305\/\" target=\"_blank\">quasar <\/a>(une source lumineuse lointaine) pour \u00e9tudier comment sa lumi\u00e8re \u00e9tait modifi\u00e9e en traversant l&#8217;une de ces bulles de gaz avant de nous parvenir. Ils\u00a0en ont d\u00e9duit que ces bulles g\u00e9antes gonflent \u00e0 la vitesse prodigieuse\u00a0de 900 km\/sec et qu&#8217;elles se seraient form\u00e9es il y a tr\u00e8s peu de temps \u00e0 l&#8217;\u00e9chelle de l&#8217;Univers, moins de 4 millions d&#8217;ann\u00e9es.<\/p>\n<p>D\u00e9di\u00e9 \u00e0 l&#8217;\u00e9tude des hautes \u00e9nergies du Cosmos, le <a title=\"Fermi Gamma-ray Space Telescope\" href=\"http:\/\/www.nasa.gov\/mission_pages\/GLAST\/main\/#.VMj04miG-MN\" target=\"_blank\"><em>Fermi Gamma-ray Space Telescope<\/em><\/a> a \u00e9t\u00e9 lanc\u00e9 en juin 2008 par la NASA. Ce satellite est \u00e9quip\u00e9 de deux d\u00e9tecteurs de rayons gamma, le<em> Large Area Telescope<\/em> (LAT) et le <em>Gamma-ray Burst Monitor<\/em> (GBM).<\/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>Le t\u00e9lescope am\u00e9ricain Fermi a confirm\u00e9 ce que les astronomes soup\u00e7onnaient d\u00e9j\u00e0\u00a0: il existe une gigantesque double bulle de gaz chauds de part et d&#8217;autre de notre galaxie, la Voie lact\u00e9e. Les chercheurs proposent deux th\u00e9ories pour expliquer la pr\u00e9sence de ces bulles (beaucoup plus discr\u00e8tes que sur la vue d&#8217;artiste ci-dessus).<!-- 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":1763,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[94,814,812,89,397,813,544,398,166],"class_list":["post-1762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-astronome","tag-bulle-de-gaz","tag-cosmos","tag-etoile","tag-rayon-gamma","tag-telescope-fermi","tag-telescope-spatial-hubble","tag-trou-noir","tag-voie-lactee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Deux bulles de gaz g\u00e9antes autour de la Voie lact\u00e9e<\/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:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/05\/deux-bulles-de-gaz-geantes-autour-de-la-voie-lactee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Deux bulles de gaz g\u00e9antes autour de la Voie lact\u00e9e\" \/>\n<meta property=\"og:description\" content=\"Le t\u00e9lescope am\u00e9ricain Fermi a confirm\u00e9 ce que les astronomes soup\u00e7onnaient d\u00e9j\u00e0\u00a0: il existe une gigantesque double bulle de gaz chauds de part et d&#8217;autre de notre galaxie, la Voie lact\u00e9e. 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