{"id":7095,"date":"2017-01-30T12:58:39","date_gmt":"2017-01-30T12:58:39","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=7095"},"modified":"2017-02-07T17:17:41","modified_gmt":"2017-02-07T17:17:41","slug":"en-video-orbiteur-mars-express-survole-mawrth-vallis","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/30\/en-video-orbiteur-mars-express-survole-mawrth-vallis\/","title":{"rendered":"En vid\u00e9o : l&#8217;orbiteur Mars Express survole Mawrth Vallis"},"content":{"rendered":"<p><strong>Gr\u00e2ce \u00e0 une animation vid\u00e9o, l\u2019Agence Spatiale Europ\u00e9enne (ESA) nous offre la possibilit\u00e9 de survoler la r\u00e9gion martienne de <em>Mawrth Vallis<\/em>.<\/strong><\/p>\n<p>Dans la grande famille des sondes qui ont survol\u00e9 la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/10\/10\/tres-jeune-cratere-photographie-mars\/\" target=\"_blank\">Plan\u00e8te rouge<\/a> depuis Mariner 4 en 1965, l\u2019orbiteur europ\u00e9en <a href=\"http:\/\/www.esa.int\/Our_Activities\/Space_Science\/Mars_Express\" target=\"_blank\">Mars Express<\/a> tient une place tout \u00e0 fait honorable. Lanc\u00e9 du cosmodrome de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/11\/16\/en-video-super-lune-leve-sur-baikonour\/\" target=\"_blank\">Ba\u00efkonour<\/a> le 2 juin 2003, Mars Express se satellise 6 mois plus tard autour de la Plan\u00e8te rouge.\u00a0Plus de 13 ann\u00e9es se sont \u00e9coul\u00e9es depuis et la sonde poursuit toujours son travail : cartographie des reliefs, \u00e9tude de l\u2019\u00e9volution des <a href=\"http:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-mars-chutes-neige-carbonique-planete-rouge-41202\/\" target=\"_blank\">calottes polaires<\/a>, analyse de l\u2019atmosph\u00e8re et de son interaction avec le <a href=\"http:\/\/www.futura-sciences.com\/sciences\/videos\/vent-solaire-terre-protegee-son-champ-magnetique-401\/\" target=\"_blank\">vent solaire<\/a>.<\/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\/x5539iu\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>L\u2019ESA nous propose un survol virtuel de la r\u00e9gion de <em>Mawrth Vallis<\/em>\u00a0rendu possible par le traitement de nombreuses photographies (dont la r\u00e9solution moyenne est de 14 m\u00e8tres par pixel), r\u00e9alis\u00e9es par la <a href=\"http:\/\/www.esa.int\/Our_Activities\/Space_Science\/Mars_Express\/Mars_Express_instruments\" target=\"_blank\">cam\u00e9ra st\u00e9r\u00e9oscopique<\/a> de la sonde.<!--more--><\/p>\n<p><em>Mawrth Vallis<\/em> est une longue vall\u00e9e\u00a0fluviale de 636 km de long dont la profondeur atteint 2 km par endroits. Elle se situe par 22\u00b0 de latitude nord en bordure occidentale d&#8217;<em>Arabia Terra<\/em>,\u00a0une r\u00e9gion martienne fortement crat\u00e9ris\u00e9e qui reprend la d\u00e9nomination attribu\u00e9e par\u00a0Giovanni Schiaparelli, l\u2019astronome italien qui observa dans sa <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/05\/bien-choisir-sa-premiere-lunette-astronomique\/\" target=\"_blank\">lunette astronomique<\/a> une zone contrast\u00e9e dont la forme g\u00e9n\u00e9rale \u00e9voquait l\u2019Arabie.<\/p>\n<p>Il y a plus de 3,6 milliards d&#8217;ann\u00e9es, l&#8217;eau coulait dans cette vall\u00e9e en direction des basses terres de<em> Chryse Planitia<\/em>\u00a0plus au nord, comme en t\u00e9moignent de nombreuses couches de s\u00e9diments stratifi\u00e9s riches en argiles. C&#8217;est en raison de ce riche pass\u00e9 hydrologique que\u00a0<em>Mawrth Vallis\u00a0<\/em>avait un temps figur\u00e9 dans la liste des sites potentiels d&#8217;atterrissage de la future mission ExoMars 2020. Mais les ing\u00e9nieurs lui ont pr\u00e9f\u00e9r\u00e9 un site moins risqu\u00e9 (la r\u00e9gion \u00a0d&#8217;<em>Oxia Planum<\/em>\u00a0pr\u00e8s de l&#8217;\u00e9quateur martien) pour poser le futur rover d\u00e9velopp\u00e9 par les agences spatiales europ\u00e9enne (<a href=\"http:\/\/www.esa.int\/fre\/ESA_in_your_country\/France\" target=\"_blank\">ESA<\/a>) et russe (<a href=\"http:\/\/en.roscosmos.ru\/\" target=\"_blank\">Roscosmos<\/a>).<\/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>Gr\u00e2ce \u00e0 une animation vid\u00e9o, l\u2019Agence Spatiale Europ\u00e9enne (ESA) nous offre la possibilit\u00e9 de survoler la r\u00e9gion martienne de Mawrth Vallis. Dans la grande famille des sondes qui ont survol\u00e9 la Plan\u00e8te rouge depuis Mariner 4 en 1965, l\u2019orbiteur europ\u00e9en Mars Express tient une place tout \u00e0 fait honorable. Lanc\u00e9 du cosmodrome de Ba\u00efkonour le &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/30\/en-video-orbiteur-mars-express-survole-mawrth-vallis\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">En vid\u00e9o : l&#8217;orbiteur Mars Express survole Mawrth Vallis<\/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":7097,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[855,2005,523,2008,702,2004,2006,115,2007,618,1013],"class_list":["post-7095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-calotte-polaire","tag-chryse-planitia","tag-esa","tag-exomars-2020","tag-mars-express","tag-mawrth-vallis","tag-oxia-planum","tag-planete-rouge","tag-roscosmos","tag-vent-solaire","tag-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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