{"id":1917,"date":"2015-02-24T06:09:02","date_gmt":"2015-02-24T06:09:02","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1917"},"modified":"2015-03-02T06:19:06","modified_gmt":"2015-03-02T06:19:06","slug":"les-antennes-une-paire-de-galaxies-en-interaction","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/24\/les-antennes-une-paire-de-galaxies-en-interaction\/","title":{"rendered":"Les Antennes, une paire de galaxies en interaction"},"content":{"rendered":"<p>En 1785 l&#8217;astronome germano-britannique <a title=\"Le t\u00e9lescope de William Herschel\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/12\/telescope-william-herschel\/\" target=\"_blank\">William Herschel<\/a> d\u00e9couvrit depuis l&#8217;h\u00e9misph\u00e8re sud un objet n\u00e9buleux faisant penser aux antennes d&#8217;un insecte. Situ\u00e9es dans la constellation du Corbeau \u00e0 un peu plus de 60 millions d&#8217;ann\u00e9es-lumi\u00e8re de la Terre, les Antennes sont le r\u00e9sultat d&#8217;une collision entre deux galaxies (NGC 4038 et 4039) ayant d\u00e9but\u00e9 il y a 100 millions d&#8217;ann\u00e9es environ et qui se poursuit toujours.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/galaxies-antennes.jpg\" rel=\"lightbox[1917]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1918\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/galaxies-antennes-450x337.jpg\" alt=\"galaxies-antennes\" width=\"450\" height=\"337\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/galaxies-antennes-450x337.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/galaxies-antennes-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/galaxies-antennes.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Ce genre de rencontre cosmique pourrait bien concerner un jour lointain notre <a title=\"Deux bulles de gaz g\u00e9antes autour de la Voie lact\u00e9e\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/05\/deux-bulles-de-gaz-geantes-autour-de-la-voie-lactee\/\" target=\"_blank\">Voie lact\u00e9e<\/a> et sa plus proche voisine, la grande <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\">galaxie d&#8217;Androm\u00e8de<\/a>.<\/p>\n<p><!--more-->Le terme de collision est trompeur car les chocs entre <a title=\"En vid\u00e9o : le Kilimanjaro sous les \u00e9toiles\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/13\/en-video-le-kilimanjaro-sous-les-etoiles\/\" target=\"_blank\">\u00e9toiles <\/a>sont tr\u00e8s rares. Plus spectaculaires sont les rencontres entre de grands nuages mol\u00e9culaires riches en poussi\u00e8re\u00a0: l&#8217;apparition d&#8217;ondes de choc est \u00e0 l&#8217;origine de la formation de millions d&#8217;\u00e9toiles dont les plus massives terminent leur courte vie en <a title=\"D\u00e9finition d'une supernova\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/dico\/d\/univers-supernova-60\/\" target=\"_blank\">supernovae<\/a>.\u00a0<span style=\"line-height: 1.5\">Ce sont les forces de mar\u00e9e qui ont compl\u00e8tement d\u00e9form\u00e9 les deux galaxies, cr\u00e9ant les Antennes.<\/span><\/p>\n<p>L&#8217;image ci-dessus (qui couvre une superficie d&#8217;environ 500 000 ann\u00e9es-lumi\u00e8re) a \u00e9t\u00e9 obtenue en combinant des photographies fournies par le t\u00e9lescope terrestre <a title=\"Subaru Telescope\" href=\"http:\/\/subarutelescope.org\/\" target=\"_blank\">Subaru <\/a>de 8\u00a0,2 m de diam\u00e8tre et le t\u00e9lescope spatial am\u00e9ricain <a title=\"Hubble Site\" href=\"http:\/\/hubblesite.org\/\" target=\"_blank\">Hubble<\/a>.<\/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>En 1785 l&#8217;astronome germano-britannique William Herschel d\u00e9couvrit depuis l&#8217;h\u00e9misph\u00e8re sud un objet n\u00e9buleux faisant penser aux antennes d&#8217;un insecte. Situ\u00e9es dans la constellation du Corbeau \u00e0 un peu plus de 60 millions d&#8217;ann\u00e9es-lumi\u00e8re de la Terre, les Antennes sont le r\u00e9sultat d&#8217;une collision entre deux galaxies (NGC 4038 et 4039) ayant d\u00e9but\u00e9 il y a &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/24\/les-antennes-une-paire-de-galaxies-en-interaction\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Les Antennes, une paire de galaxies en interaction<\/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":1918,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[279,850,89,112,330,851,852,403,544,853,166,129],"class_list":["post-1917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-annee-lumiere","tag-constellation-du-corbeau","tag-etoile","tag-galaxie","tag-galaxie-dandromede","tag-ngc-4038","tag-ngc-4039","tag-supernova","tag-telescope-spatial-hubble","tag-telescope-subaru","tag-voie-lactee","tag-william-herschel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les Antennes, une paire de galaxies en interaction<\/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\/24\/les-antennes-une-paire-de-galaxies-en-interaction\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les Antennes, une paire de galaxies en interaction\" \/>\n<meta property=\"og:description\" content=\"En 1785 l&#8217;astronome germano-britannique William Herschel d\u00e9couvrit depuis l&#8217;h\u00e9misph\u00e8re sud un objet n\u00e9buleux faisant penser aux antennes d&#8217;un insecte. 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