{"id":33098,"date":"2024-03-19T13:04:41","date_gmt":"2024-03-19T13:04:41","guid":{"rendered":"https:\/\/dekkbi.com\/?p=33098"},"modified":"2024-03-19T13:04:41","modified_gmt":"2024-03-19T13:04:41","slug":"un-immense-volcan-cache-decouvert-sur-mars-des-signes-de-vies-possibles","status":"publish","type":"post","link":"https:\/\/dekkbi.com\/?p=33098","title":{"rendered":"Un immense volcan cach\u00e9 d\u00e9couvert sur Mars, des signes de vies possibles ?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Un volcan g\u00e9ant a \u00e9t\u00e9 d\u00e9couvert sur Mars, cach\u00e9 aux yeux de tous depuis des d\u00e9cennies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce colosse, situ\u00e9 pr\u00e8s de l&rsquo;\u00e9quateur martien dans la province volcanique de Tharsis, s&rsquo;\u00e9tend sur pr\u00e8s de 450 kilom\u00e8tres de large et s&rsquo;\u00e9l\u00e8ve \u00e0 plus de 9 000 m\u00e8tres d&rsquo;altitude. Une r\u00e9v\u00e9lation faite lors de la 55\u00e8me Conf\u00e9rence de science lunaire et\u00a0plan\u00e9taire\u00a0au Texas, qui ouvre un nouveau chapitre dans l&rsquo;exploration\u00a0de la\u00a0plan\u00e8te rouge. Ce qui rend cette d\u00e9couverte particuli\u00e8rement intrigante, c&rsquo;est la pr\u00e9sence \u00e0 sa base de ce qui semble \u00eatre les vestiges d&rsquo;un glacier enfoui, promettant de faire de ce volcan un site cl\u00e9 pour la\u00a0recherche\u00a0astrobiologique et la qu\u00eate de signes de\u00a0vie extraterrestre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce volcan, encore sans nom officiel, se trouve aux confins de la r\u00e9gion embl\u00e9matique de Noctis Labyrinthus, le \u00ab\u00a0labyrinthe de la nuit\u00a0\u00bb, et des immenses canyons de\u00a0Valles Marineris, ou Vall\u00e9e des Marins. Son sommet central pr\u00e9sente des plateaux sur\u00e9lev\u00e9s formant un arc, tandis que ses pentes s&rsquo;\u00e9tendent sur plus de 225\u00a0kilom\u00e8tres\u00a0dans diff\u00e9rentes directions. Pr\u00e8s du centre, on trouve les restes d&rsquo;un\u00a0crat\u00e8re\u00a0volcanique effondr\u00e9, qui aurait autrefois abrit\u00e9 un lac de lave.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les sondes spatiales en orbite autour de Mars photographiaient sans le savoir ce volcan depuis l&rsquo;envoi de Mariner 9 par la NASA en 1971. Sa d\u00e9couverte r\u00e9cente souligne l&rsquo;ampleur des myst\u00e8res que Mars continue de nous cacher. L&rsquo;identification de ce g\u00e9ant est survenue lors de l&rsquo;analyse de la\u00a0g\u00e9ologie\u00a0d&rsquo;une zone o\u00f9 les restes d&rsquo;un glacier avaient \u00e9t\u00e9 d\u00e9couverts pr\u00e9c\u00e9demment, r\u00e9v\u00e9lant ainsi une structure volcanique immense.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"870\" height=\"489\" src=\"https:\/\/static.techno-science.net\/illustration\/Source\/LS\/2024\/03\/16\/KNZ76Fz8R7S5CtZXrzRQpZ-1200-80.jpg\" alt=\"\"><br><em>Un regard rapproch\u00e9 du site o\u00f9 le volcan a \u00e9t\u00e9 d\u00e9couvert sur Mars.<br>Cr\u00e9dit: Images de fond: mosa\u00efque de la cam\u00e9ra de contexte (CTX) de l&rsquo;orbiteur\u00a0de reconnaissance de Mars (MRO) de la NASA et mod\u00e8le\u00a0num\u00e9rique\u00a0d&rsquo;\u00e9l\u00e9vation de l&rsquo;altim\u00e8tre\u00a0laser orbiteur\u00a0Mars Global Surveyor\u00a0(MGS) MOLA. Interpr\u00e9tation g\u00e9ologique &amp; annotations par Pascal Lee &amp; Sourabh Shubham 2024<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><br>Les implications de cette d\u00e9couverte sont vastes, posant de nouvelles questions sur la dur\u00e9e d&rsquo;activit\u00e9 du volcan et son potentiel pour abriter la vie, gr\u00e2ce \u00e0 la chaleur sur des temps longs et \u00e0 l&rsquo;eau provenant de la glace sous-jacente. Cette exploration nous rapproche un peu plus des r\u00e9ponses aux grandes questions sur Mars et son potentiel biologique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un volcan g\u00e9ant a \u00e9t\u00e9 d\u00e9couvert sur Mars, cach\u00e9 aux yeux de tous depuis des d\u00e9cennies. Ce colosse, situ\u00e9 pr\u00e8s<\/p>\n","protected":false},"author":1,"featured_media":33099,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-33098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie"],"_links":{"self":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/33098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=33098"}],"version-history":[{"count":1,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/33098\/revisions"}],"predecessor-version":[{"id":33100,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/posts\/33098\/revisions\/33100"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=\/wp\/v2\/media\/33099"}],"wp:attachment":[{"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dekkbi.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}