{"id":2039,"date":"2015-03-04T06:14:54","date_gmt":"2015-03-04T06:14:54","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2039"},"modified":"2015-03-10T05:58:22","modified_gmt":"2015-03-10T05:58:22","slug":"une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/","title":{"rendered":"Une image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy"},"content":{"rendered":"<p>Que se passerait-il si une cam\u00e9ra con\u00e7ue pour observer le ciel \u00e0 des milliards d&#8217;ann\u00e9es-lumi\u00e8re pointait accidentellement une <a title=\"Com\u00e8te C\/2014 Q2 Lovejoy : du c\u00f4t\u00e9 d\u2019Orion\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/11\/comete-c2014-q2-lovejoy-du-cote-dorion\/\" target=\"_blank\">com\u00e8te <\/a>situ\u00e9e \u00e0 80 millions d&#8217;ann\u00e9es-lumi\u00e8re ? C&#8217;est ce qui est arriv\u00e9 le 27 d\u00e9cembre dernier quand la com\u00e8te <a title=\"La com\u00e8te C\/2014 Q2 Lovejoy arrive\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/18\/la-comete-c2014-q2-lovejoy-arrive\/\" target=\"_blank\">C\/2014 Q2 Lovejoy<\/a> est entr\u00e9e dans le champ de la DEC (<a title=\"Dark Energy Detectives\" href=\"http:\/\/darkenergydetectives.org\/\" target=\"_blank\"><em>Dark-Energy Camera<\/em><\/a>) et cela nous vaut une superbe image de l&#8217;astre chevelu.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg\" rel=\"lightbox[2039]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2040\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy-450x298.jpg\" alt=\"lovejoy\" width=\"450\" height=\"298\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy-450x298.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy-1024x679.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg 1356w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>C&#8217;est \u00e0 la fin de l&#8217;ann\u00e9e 2012 qu&#8217;est entr\u00e9e en service la plus puissante \u00a0cam\u00e9ra astronomique du monde d\u00e9di\u00e9e \u00e0 la recherche de l&#8217;<a title=\"\u00c9nergie sombre et mati\u00e8re noire : \u00e0 la d\u00e9couverte du c\u00f4t\u00e9 obscur de l\u2019Univers\" href=\"http:\/\/www.futura-sciences.com\/videos\/d\/energie-sombre-matiere-noire-decouverte-cote-obscur-univers-1088\/\" target=\"_blank\">\u00e9nergie sombre<\/a>.<\/p>\n<p><!--more-->Quand en 1998 les cosmologistes ont d\u00e9couvert l&#8217;acc\u00e9l\u00e9ration de l&#8217;expansion de l&#8217;Univers (contrairement aux pr\u00e9dictions de la th\u00e9orie de la <a title=\"La premi\u00e8re preuve de la relativit\u00e9 g\u00e9n\u00e9rale a 90 ans\" href=\"http:\/\/www.futura-sciences.com\/magazines\/matiere\/infos\/actu\/d\/physique-premiere-preuve-relativite-generale-90-ans-19471\/\" target=\"_blank\">Relativit\u00e9 G\u00e9n\u00e9rale<\/a> \u00e9mise par Albert Einstein), ils ont imagin\u00e9 l&#8217;existence d&#8217;une \u00e9nergie sombre pouvant exercer une\u00a0force gravitationnelle r\u00e9pulsive.<\/p>\n<p>Avec ses 570 millions de pixels, la <em>Dark-Energy Camera<\/em> est capable de capturer 100 000 galaxies jusqu&#8217;\u00e0 8 milliards d&#8217;ann\u00e9es-lumi\u00e8re en une seule pose. Cette cam\u00e9ra (maintenue sous vide \u00e0 une temp\u00e9rature de -150\u00b0 C) est install\u00e9e sur un t\u00e9lescope de 4 m\u00e8tres de diam\u00e8tre \u00e0 l&#8217;observatoire Victor M. Blanco situ\u00e9 sur le <a title=\"Cerro Tololo Inter-American Observatory\" href=\"http:\/\/www.ctio.noao.edu\/noao\/\" target=\"_blank\">Cerro Tololo<\/a>, un sommet des Andes Chiliennes.<\/p>\n<p>Si elle n&#8217;a pas encore permis aux cosmologistes de r\u00e9soudre l&#8217;\u00e9nigme de l&#8217;\u00e9nergie sombre, la DEC a en tout cas magnifiquement immortalis\u00e9 le passage de la cinqui\u00e8me com\u00e8te d\u00e9couverte par l&#8217;astronome amateur australien Terry Lovejoy.<\/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>Que se passerait-il si une cam\u00e9ra con\u00e7ue pour observer le ciel \u00e0 des milliards d&#8217;ann\u00e9es-lumi\u00e8re pointait accidentellement une com\u00e8te situ\u00e9e \u00e0 80 millions d&#8217;ann\u00e9es-lumi\u00e8re ? C&#8217;est ce qui est arriv\u00e9 le 27 d\u00e9cembre dernier quand la com\u00e8te C\/2014 Q2 Lovejoy est entr\u00e9e dans le champ de la DEC (Dark-Energy Camera) et cela nous vaut une &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Une image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy<\/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":2040,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[874,876,701,872,871,112,875,873,96,685,476],"class_list":["post-2039","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-albert-einstein","tag-cerro-tololo","tag-comete-c2014-q2-lovejoy","tag-dark-energy-camera","tag-energie-sombre","tag-galaxie","tag-observatoire-victor-m-blanco","tag-relativite-generale","tag-telescope","tag-terry-lovejoy","tag-univers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy<\/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\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy\" \/>\n<meta property=\"og:description\" content=\"Que se passerait-il si une cam\u00e9ra con\u00e7ue pour observer le ciel \u00e0 des milliards d&#8217;ann\u00e9es-lumi\u00e8re pointait accidentellement une com\u00e8te situ\u00e9e \u00e0 80 millions d&#8217;ann\u00e9es-lumi\u00e8re ? C&#8217;est ce qui est arriv\u00e9 le 27 d\u00e9cembre dernier quand la com\u00e8te C\/2014 Q2 Lovejoy est entr\u00e9e dans le champ de la DEC (Dark-Energy Camera) et cela nous vaut une &hellip; Continuer la lecture de Une image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2015-03-04T06:14:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-03-10T05:58:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1356\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\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\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\",\"name\":\"Image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg\",\"datePublished\":\"2015-03-04T06:14:54+00:00\",\"dateModified\":\"2015-03-10T05:58:22+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/lovejoy.jpg\",\"width\":1356,\"height\":900},{\"@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. 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