{"id":4150,"date":"2015-11-18T05:46:12","date_gmt":"2015-11-18T05:46:12","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4150"},"modified":"2015-11-24T05:53:31","modified_gmt":"2015-11-24T05:53:31","slug":"titan-croise-encelade-derriere-les-anneaux-de-saturne","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/18\/titan-croise-encelade-derriere-les-anneaux-de-saturne\/","title":{"rendered":"Titan croise Encelade derri\u00e8re les anneaux de Saturne"},"content":{"rendered":"<p><strong>Les archives de la mission Cassini regorgent de belles images prises dans la banlieue de Saturne, comme cet alignement des anneaux avec Titan et Encelade.<\/strong><\/p>\n<p>C&#8217;est une sc\u00e8ne \u00e9trange que nous r\u00e9v\u00e8le cette <a href=\"http:\/\/photojournal.jpl.nasa.gov\/catalog\/PIA08235\" target=\"_blank\">photographie de la NASA<\/a> r\u00e9alis\u00e9e en lumi\u00e8re rouge par le vaisseau spatial Cassini le 10 juin 2006. La sonde se trouvait alors \u00e0 une distance d&#8217;environ 3,9 millions de kilom\u00e8tres d&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/18\/gros-plan-sur-la-banquise-dencelade-satellite-de-saturne\/\" target=\"_blank\">Encelade<\/a> et 5,3 millions de kilom\u00e8tres de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/29\/iles-mysterieuses-titan\/\" target=\"_blank\">Titan<\/a>, les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/07\/03\/linclinaison-des-anneaux-de-saturne-de-2004-a-2015\/\" target=\"_blank\">anneaux de Saturne<\/a> venant s&#8217;intercaler entre Cassini et les deux lunes.<\/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\/x2h3se0\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : un sous-marin sur Titan, dans les profondeurs du lac Kraken Mare<\/strong><\/p>\n<p>\u00c0 contre-jour, la fine atmosph\u00e8re de Titan (5150 km de diam\u00e8tre) devient particuli\u00e8rement brillante en diffusant la lumi\u00e8re solaire. On sait que l&#8217;\u00e9paisseur de cette atmosph\u00e8re varie de 200 \u00e0 900 km et qu&#8217;elle est principalement constitu\u00e9e d&#8217;azote mol\u00e9culaire (95 \u00e0 98%) et de m\u00e9thane (ainsi que quelques traces d&#8217;hydrocarbures).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/11\/nasa.jpg\" rel=\"lightbox[4150]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4151\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/11\/nasa-450x265.jpg\" alt=\"nasa\" width=\"450\" height=\"265\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/11\/nasa-450x265.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/11\/nasa.jpg 890w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Le 14 janvier 2005 la sonde Cassini avait largu\u00e9 sur Titan le module <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/17\/huygens-sur-titan-cetait-il-y-10-ans\/\" target=\"_blank\">Huygens <\/a>qui photographia \u00e0 sa surface des lacs de m\u00e9thane et d&#8217;\u00e9thane.<\/p>\n<p><!--more-->Encelade (505 km de diam\u00e8tre) est une petite lune de Saturne qui intrigue beaucoup les scientifiques : il y a une dizaine d&#8217;ann\u00e9es on a d\u00e9couvert que sa cro\u00fbte glac\u00e9e laissait \u00e9chapper des geysers compos\u00e9s de vapeur d&#8217;eau et de mati\u00e8re organique. Le 28 octobre dernier <a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/systeme-solaire-cassini-nouveau-plonge-panaches-encelade-60271\/\" target=\"_blank\">Cassini a de nouveau plong\u00e9 dans les panaches d&#8217;Encelade<\/a> vaguement visibles sur cette image comme un liser\u00e9 lumineux au niveau du p\u00f4le sud de la petite lune.<\/p>\n<p>L&#8217;\u00e9chelle de l&#8217;image est de 23 kilom\u00e8tres par pixel sur Encelade et 32 \u200b\u200bkilom\u00e8tres sur Titan.<\/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>Les archives de la mission Cassini regorgent de belles images prises dans la banlieue de Saturne, comme cet alignement des anneaux avec Titan et Encelade. C&#8217;est une sc\u00e8ne \u00e9trange que nous r\u00e9v\u00e8le cette photographie de la NASA r\u00e9alis\u00e9e en lumi\u00e8re rouge par le vaisseau spatial Cassini le 10 juin 2006. La sonde se trouvait alors &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/18\/titan-croise-encelade-derriere-les-anneaux-de-saturne\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Titan croise Encelade derri\u00e8re les anneaux de Saturne<\/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":4151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[646,755,136,754,567],"class_list":["post-4150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-encelade","tag-module-huygens","tag-saturne","tag-sonde-cassini","tag-titan"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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