{"id":1031,"date":"2014-04-13T13:33:42","date_gmt":"2014-04-13T18:33:42","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=1031"},"modified":"2014-04-21T10:16:15","modified_gmt":"2014-04-21T15:16:15","slug":"latmosphere-martienne-netait-pas-si-dense-que-ca","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/latmosphere-martienne-netait-pas-si-dense-que-ca\/","title":{"rendered":"L&#8217;atmosph\u00e8re martienne n&#8217;\u00e9tait pas si dense que \u00e7a"},"content":{"rendered":"<div id=\"attachment_1028\" style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/04\/534px-Mars_atmosphere-e1398092451538.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1028\" class=\"size-full wp-image-1028\" alt=\"L'atmosph\u00e8re de Mars, ce qui est tr\u00e8s mince par rapport \u00e0 la Terre, est visible le long du bord de la plan\u00e8te. (Cr\u00e9dit photo: Viking Orbiter Raw Image Archive, Wikimedia Commons)\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/04\/534px-Mars_atmosphere-e1398092451538.jpg\" width=\"480\" height=\"539\" \/><\/a><p id=\"caption-attachment-1028\" class=\"wp-caption-text\">L&#8217;atmosph\u00e8re de Mars, ce qui est tr\u00e8s mince par rapport \u00e0 la Terre, est visible le long du bord de la plan\u00e8te. (Cr\u00e9dit photo: Viking Orbiter Raw Image Archive, <a href=\"http:\/\/commons.wikimedia.org\/wiki\/File:Mars_atmosphere.jpg\">Wikimedia Commons<\/a>)<\/p><\/div>\n<p>Les m\u00e9t\u00e9orites ont moins de chance d\u2019atteindre la surface et former un crat\u00e8re sur une plan\u00e8te lorsque l\u2019atmosph\u00e8re de celle-ci est dense. Des chercheurs ont analys\u00e9 les crat\u00e8res de m\u00e9t\u00e9orites dans une zone de la plan\u00e8te Mars appel\u00e9e Aeolis Dorsa. Ils concluent que l\u2019atmosph\u00e8re martienne d\u2019il y a 3,6 milliards d\u2019ann\u00e9e \u00e9tait 150 fois plus dense qu\u2019aujourd\u2019hui, mais que cela n\u2019\u00e9tait pas suffisant pour permettre \u00e0 de l\u2019eau liquide de couler \u00e0 la surface et d\u2019expliquer les canaux martiens. Ils estiment que l\u2019eau a bien coul\u00e9 sur Mars alors que l\u2019atmosph\u00e8re martienne \u00e9tait assez dense pendant une br\u00e8ve p\u00e9riode temps \u00e0 cause de l\u2019activit\u00e9 volcanique et\/ou d\u2019un impact majeur.<\/p>\n<p><!--more--><br \/>\nPour lire l\u2019article original publi\u00e9 dans<em>\u00a0Nature Geoscience\u00a0<\/em>le\u00a0<strong>13 Avril 2014<\/strong>,\u00a0<span style=\"text-decoration: underline;\"><a href=\"http:\/\/www.nature.com\/ngeo\/journal\/vaop\/ncurrent\/full\/ngeo2137.html\" target=\"_blank\">cliquez\u00a0ici<\/a><\/span>.<\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>Auteur \u00e0 contacter pour plus d\u2019informations<\/strong><\/em><\/span><\/p>\n<h4><a href=\"http:\/\/geosci.uchicago.edu\/~kite\/\" target=\"_blank\">Edwin Kite<\/a>, Princeton University, USA<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Les m\u00e9t\u00e9orites ont moins de chance d\u2019atteindre la surface et former un crat\u00e8re sur une plan\u00e8te lorsque l\u2019atmosph\u00e8re de celle-ci est dense. Des chercheurs ont analys\u00e9 les crat\u00e8res de m\u00e9t\u00e9orites dans une zone de la plan\u00e8te Mars appel\u00e9e Aeolis Dorsa. Ils concluent que l\u2019atmosph\u00e8re martienne d\u2019il y a 3,6 milliards d\u2019ann\u00e9e \u00e9tait 150 fois plus [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[531],"tags":[683,689],"class_list":["post-1031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-of-interest-fr","tag-environnement","tag-espace"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/04\/534px-Mars_atmosphere-e1398092451538.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-gD","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1031","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=1031"}],"version-history":[{"count":1,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1031\/revisions"}],"predecessor-version":[{"id":1032,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1031\/revisions\/1032"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/1028"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=1031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=1031"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=1031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}