{"id":508,"date":"2016-10-19T22:25:31","date_gmt":"2016-10-19T22:25:31","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/frankel\/?p=508"},"modified":"2016-11-27T23:08:18","modified_gmt":"2016-11-27T23:08:18","slug":"tgo-nouvelle-sonde-europeenne-autour-de-mars","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/","title":{"rendered":"TGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars"},"content":{"rendered":"
\"La<\/a>
La sonde TGO de l’ESA, en orbite autour de Mars (vue d’artiste)<\/figcaption><\/figure>\n

Ce mercredi 19 octobre, la sonde TGO (Trace Gas Orbiter<\/em>) de l’agence spatiale europ\u00e9enne (ESA) s’est mise en orbite avec succ\u00e8s autour de Mars. Apr\u00e8s la premi\u00e8re tentative \u00e9galement couronn\u00e9e de succ\u00e8s en 2003 de la sonde Mars Express, c’est la deuxi\u00e8me fois sur deux tentatives que l’Europe r\u00e9ussit \u00e0 placer un engin spatial en orbite autour de la plan\u00e8te rouge: un “sans faute”.<\/p>\n

Le r\u00f4le de TGO est de traquer les gaz rares de l’atmosph\u00e8re martienne et en particulier de voir si des bouff\u00e9es saisonni\u00e8res de m\u00e9thane ont r\u00e9ellement lieu \u00e0 certains endroits, ce qui pourrait attester d’une activit\u00e9 de microorganismes vivants dans le sous-sol, ou d’une forme de volcanisme, ce qui dans les deux cas serait une surprise de taille.<\/p>\n

\"La<\/a>
La sonde Schiaparelli aurait d\u00fb se poser en douceur sur Mars, mais silence radio…<\/figcaption><\/figure>\n

Seule onde au tableau : la petite sonde (600\u00a0kg tout de m\u00eame\u00a0!) Schiaparelli<\/em> qui devait se d\u00e9tacher du bus orbital et se poser en douceur sur Mars\u2014ce qui aurait constitu\u00e9 une premi\u00e8re pour l’ESA\u2014a bien effectu\u00e9 le d\u00e9but de son p\u00e9riple en plongeant, bouclier thermique en avant, dans les couches denses de l’atmosph\u00e8re martienne, mais le signal radio a \u00e9t\u00e9 perdu peu apr\u00e8s. Heureusement, la sonde a transmis suffisamment de t\u00e9l\u00e9m\u00e9trie avant de rendre l’\u00e2me pour que les ing\u00e9nieurs puissent avoir une id\u00e9e de ce qui a bien pu se passer sur le chemin de la descente. Il s’agissait en effet d’une tentative, il faut le souligner\u00a0: apprendre \u00e0 se poser sur Mars, ce qui n’est pas une sin\u00e9cure. Il reste donc du pain sur la planche pour les ing\u00e9nieurs de l’ESA : d\u00e9cid\u00e9ment, apr\u00e8s d\u00e9j\u00e0 une tentative d’atterrissage sold\u00e9e par un \u00e9chec en 2004 (la sonde britannique Beagle 2<\/em>), Mars ne se laisse pas conqu\u00e9rir facilement…<\/p>\n","protected":false},"excerpt":{"rendered":"

Ce mercredi 19 octobre, la sonde TGO (Trace Gas Orbiter) de l’agence spatiale europ\u00e9enne (ESA) s’est mise en orbite avec succ\u00e8s autour de Mars. Apr\u00e8s la premi\u00e8re tentative \u00e9galement couronn\u00e9e de succ\u00e8s en 2003 de la sonde Mars Express, c’est la deuxi\u00e8me fois sur deux tentatives que l’Europe r\u00e9ussit \u00e0 placer un engin spatial en … Continuer la lecture de TGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars<\/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-508","post","type-post","status-publish","format-standard","hentry","category-actualites","category-sciences"],"yoast_head":"\nTGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue<\/title>\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\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/\" \/>\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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/\",\"name\":\"TGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars - 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\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg\",\"datePublished\":\"2016-10-19T22:25:31+00:00\",\"dateModified\":\"2016-11-27T23:08:18+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg\",\"width\":3500,\"height\":2800,\"caption\":\"La sonde TGO de l'ESA, en orbite autour de Mars (vue d'artiste)\"},{\"@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 ? Apr\u00e8s tout, qu\u2019est-elle, sinon une longue et syst\u00e9matique curiosit\u00e9 ? Andr\u00e9 Maurois\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.futura-sciences.com\/frankel\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63\",\"name\":\"Charles Frankel\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/93767f419dc6f3384f1e52a1a4c8f5b5?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/93767f419dc6f3384f1e52a1a4c8f5b5?s=96&d=mm&r=g\",\"caption\":\"Charles Frankel\"},\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/author\/cfrankel\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/","twitter_misc":{"\u00c9crit par":"Charles Frankel","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/","url":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/","name":"TGO\u00a0: nouvelle sonde europ\u00e9enne autour de Mars - 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\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg","datePublished":"2016-10-19T22:25:31+00:00","dateModified":"2016-11-27T23:08:18+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/10\/19\/tgo-nouvelle-sonde-europeenne-autour-de-mars\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/10\/TGO-beauty-shot.jpg","width":3500,"height":2800,"caption":"La sonde TGO de l'ESA, en orbite autour de Mars (vue d'artiste)"},{"@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 ? Apr\u00e8s tout, qu\u2019est-elle, sinon une longue et syst\u00e9matique curiosit\u00e9 ? Andr\u00e9 Maurois","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.futura-sciences.com\/frankel\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63","name":"Charles Frankel","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/93767f419dc6f3384f1e52a1a4c8f5b5?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/93767f419dc6f3384f1e52a1a4c8f5b5?s=96&d=mm&r=g","caption":"Charles Frankel"},"url":"https:\/\/blogs.futura-sciences.com\/frankel\/author\/cfrankel\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/posts\/508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/comments?post=508"}],"version-history":[{"count":2,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/posts\/508\/revisions"}],"predecessor-version":[{"id":516,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/posts\/508\/revisions\/516"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/media?parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/categories?post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/frankel\/wp-json\/wp\/v2\/tags?post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}