{"id":2974,"date":"2015-06-24T04:49:42","date_gmt":"2015-06-24T04:49:42","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2974"},"modified":"2015-06-30T04:43:08","modified_gmt":"2015-06-30T04:43:08","slug":"mro-detecte-du-verre-a-la-surface-de-mars","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/24\/mro-detecte-du-verre-a-la-surface-de-mars\/","title":{"rendered":"MRO d\u00e9tecte du verre \u00e0 la surface de Mars"},"content":{"rendered":"<p><strong>Des d\u00e9p\u00f4ts de verre, n\u00e9s de la fusion des roches apr\u00e8s de violents impacts m\u00e9t\u00e9oritiques, ont \u00e9t\u00e9 d\u00e9couverts sur la plan\u00e8te Mars. Ils pourraient avoir emprisonn\u00e9 des preuves d&#8217;une \u00e9ventuelle vie pass\u00e9e.<\/strong><\/p>\n<p>Sur <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/08\/don-parker-lastronome-qui-aimait-la-planete-mars\/\" target=\"_blank\">Mars<\/a>, la quatri\u00e8me plan\u00e8te du Syst\u00e8me solaire, on trouve tout ou presque : des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/27\/les-etonnants-nuages-geants-de-la-planete-mars\/\" target=\"_blank\">nuages g\u00e9ants<\/a>, du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/25\/mars-le-mystere-du-methane-reste-entier\/\" target=\"_blank\">m\u00e9thane<\/a>, des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/27\/la-sonde-maven-enregistre-des-aurores-polaires-sur-mars\/\" target=\"_blank\">aurores polaires<\/a>, d&#8217;anciens <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/15\/le-cratere-gale-sur-mars-est-un-ancien-lac\/\" target=\"_blank\">lacs<\/a>&#8230; et m\u00eame un <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/06\/le-cercueil-sur-mars-une-pareidolie\/\" target=\"_blank\">cercueil <\/a>!<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/06\/mars_verre.jpg\" rel=\"lightbox[2974]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2975\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/06\/mars_verre-450x296.jpg\" alt=\"mars_verre\" width=\"450\" height=\"296\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/06\/mars_verre-450x296.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/06\/mars_verre.jpg 794w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Des chercheurs de l&#8217;universit\u00e9 am\u00e9ricaine de <a href=\"https:\/\/www.brown.edu\/\" target=\"_blank\">Brown <\/a>viennent de publier dans la revue <a href=\"http:\/\/geology.gsapubs.org\/content\/early\/2015\/06\/04\/G36953.1.abstract\" target=\"_blank\"><em>Geology<\/em> <\/a>le bilan d&#8217;une minutieuse \u00e9tude conduite depuis l&#8217;\u00e9t\u00e9 2006, date \u00e0 laquelle la sonde <a href=\"http:\/\/mars.nasa.gov\/mro\/\" target=\"_blank\">MRO <\/a>(<em>Mars Reconnaissance Orbiter<\/em>) a commenc\u00e9 \u00e0 \u00e9tudier la Plan\u00e8te rouge depuis son orbite basse circulaire.<\/p>\n<p><!--more-->Utilisant les donn\u00e9es fournies par le spectrom\u00e8tre CRISM (<em>Compact Reconnaissance Imaging Spectrometers for Mars<\/em>), ils ont identifi\u00e9 des d\u00e9p\u00f4ts de verre au fond d&#8217;anciens crat\u00e8res d&#8217;impact (ces d\u00e9p\u00f4ts correspondent aux zones de couleur verte sur l&#8217;image ci-dessus).<\/p>\n<p>Ce verre s&#8217;est form\u00e9 lorsque la roche a \u00e9t\u00e9 port\u00e9e \u00e0 tr\u00e8s haute temp\u00e9rature au moment de l&#8217;impact d&#8217;une m\u00e9t\u00e9orite puis s&#8217;est brutalement refroidie. On a d\u00e9j\u00e0 retrouv\u00e9 dans des impactites terrestres de petites quantit\u00e9s de mati\u00e8re organique emprisonn\u00e9e ; pourrait-il en \u00eatre de m\u00eame sur Mars ?<\/p>\n<p>La prochaine mission am\u00e9ricaine \u00e0 la surface de la Plan\u00e8te rouge, <a href=\"http:\/\/mars.jpl.nasa.gov\/mars2020\/\" target=\"_blank\">Mars 2020<\/a>, pourra peut-\u00eatre r\u00e9pondre \u00e0 cette passionnante question&#8230;<\/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>Des d\u00e9p\u00f4ts de verre, n\u00e9s de la fusion des roches apr\u00e8s de violents impacts m\u00e9t\u00e9oritiques, ont \u00e9t\u00e9 d\u00e9couverts sur la plan\u00e8te Mars. Ils pourraient avoir emprisonn\u00e9 des preuves d&#8217;une \u00e9ventuelle vie pass\u00e9e. Sur Mars, la quatri\u00e8me plan\u00e8te du Syst\u00e8me solaire, on trouve tout ou presque : des nuages g\u00e9ants, du m\u00e9thane, des aurores polaires, d&#8217;anciens &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/24\/mro-detecte-du-verre-a-la-surface-de-mars\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">MRO d\u00e9tecte du verre \u00e0 la surface de Mars<\/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":2975,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[1091,116,771,114,575,341],"class_list":["post-2974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-impactite","tag-mars","tag-mro","tag-planete","tag-spectrometre","tag-verre"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MRO d\u00e9tecte du verre \u00e0 la surface de Mars<\/title>\n<meta name=\"description\" content=\"Des d\u00e9p\u00f4ts de verre ont \u00e9t\u00e9 d\u00e9couverts sur la plan\u00e8te Mars. 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