{"id":619,"date":"2017-05-05T14:22:00","date_gmt":"2017-05-05T14:22:00","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/frankel\/?p=619"},"modified":"2017-07-09T14:26:45","modified_gmt":"2017-07-09T14:26:45","slug":"opportunity-explore-une-ravine","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/","title":{"rendered":"Opportunity explore une ravine"},"content":{"rendered":"

\u00c0 l\u2019heure o\u00f9 l\u2019automobile Curiosity continue son exploration du crat\u00e8re Gale et de ses s\u00e9diments lacustres, il est bon de saluer \u00e0 nouveau la performance de son pr\u00e9d\u00e9cesseur, le robot Opportunity, qui en est \u00e0 sa 14\u00e8me ann\u00e9e de travail sur Mars (il n\u2019\u00e9tait cens\u00e9 fonctionner que 3 mois minimum). On se serait content\u00e9 d\u2019un petit kilom\u00e8tre parcouru sur son site \u00e9quatorial de Planum Meridiani : il en est \u00e0 44,4 kilom\u00e8tres\u2014plus qu\u2019un marathon. Bien s\u00fbr quelques instruments donnent des signes de faiblesse, dont la m\u00e9moire de l\u2019ordinateur, de sorte que l\u2019engin doit transmettre ses donn\u00e9es au jour le jour.<\/p>\n

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Le parcours d’Opportunity depuis 2014, parvenu sur le rebord du crat\u00e8re d’impact Endeavour.<\/figcaption><\/figure>\n

Cela fait pr\u00e8s de six ans qu\u2019il butine autour d\u2019un gros crat\u00e8re d\u2019impact de 22 km de diam\u00e8tre : Endeavour Crater. Apr\u00e8s avoir explor\u00e9 une fraction de sa circomf\u00e9rence, Opportunity s\u2019appr\u00eate \u00e0 descendre la pente, entre deux promontoires nomm\u00e9s Cape Tribulation et Cape Byron pour explorer une petite ravine ayant toute l\u2019apparence d\u2019un ancien \u00e9coulement d\u2019eau liquide. C\u2019est encore un bonus pour les plan\u00e9tologues qui seront tr\u00e8s heureux de d\u00e9couvrir in situ et en gros plan ce couloir d\u2019\u00e9rosion\u2026<\/p>\n

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Depuis orbite, les donn\u00e9es spectrales caract\u00e9risent la composition du rebord du crat\u00e8re. Entre Tribulation et Byron, Opportunity descendra la pente vers les mots “Endeavour Crater” o\u00f9 se trouve la ravine…<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

\u00c0 l\u2019heure o\u00f9 l\u2019automobile Curiosity continue son exploration du crat\u00e8re Gale et de ses s\u00e9diments lacustres, il est bon de saluer \u00e0 nouveau la performance de son pr\u00e9d\u00e9cesseur, le robot Opportunity, qui en est \u00e0 sa 14\u00e8me ann\u00e9e de travail sur Mars (il n\u2019\u00e9tait cens\u00e9 fonctionner que 3 mois minimum). On se serait content\u00e9 d\u2019un … Continuer la lecture de Opportunity explore une ravine<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[13,4],"tags":[],"class_list":["post-619","post","type-post","status-publish","format-standard","hentry","category-actualites","category-sciences"],"yoast_head":"\nOpportunity explore une ravine - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue<\/title>\n<meta name=\"description\" content=\"Le rover martien Opportunity est sur le point de descendre la pente du crat\u00e8re Endeavour pour explorer une ravine probablement cr\u00e9\u00e9e par un \u00e9coulement d'eau\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Charles Frankel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/\",\"name\":\"Opportunity explore une ravine - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2017\/05\/Opportunity-traverse-map-PIA19154-low-res.jpg\",\"datePublished\":\"2017-05-05T14:22:00+00:00\",\"dateModified\":\"2017-07-09T14:26:45+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63\"},\"description\":\"Le rover martien Opportunity est sur le point de descendre la pente du crat\u00e8re Endeavour pour explorer une ravine probablement cr\u00e9\u00e9e par un \u00e9coulement d'eau\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2017\/05\/05\/opportunity-explore-une-ravine\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2017\/05\/Opportunity-traverse-map-PIA19154-low-res.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2017\/05\/Opportunity-traverse-map-PIA19154-low-res.jpg\",\"width\":933,\"height\":705,\"caption\":\"Le parcours d'Opportunity depuis 2014, parvenu sur le rebord du crat\u00e8re d'impact Endeavour.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/\",\"name\":\"Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue\",\"description\":\"La science ? 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