{"id":1144,"date":"2014-11-14T15:41:44","date_gmt":"2014-11-14T15:41:44","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1144"},"modified":"2014-11-15T09:06:41","modified_gmt":"2014-11-15T09:06:41","slug":"philae-surprises-incertitudes","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/","title":{"rendered":"Philae : surprises et incertitudes"},"content":{"rendered":"

Voici le point sur la situation 48 heures apr\u00e8s l’arriv\u00e9e mouvement\u00e9e de l’atterrisseur Philae<\/a> \u00e0 la surface de la com\u00e8te 67P\/Churyumov-Gerasimenko.<\/strong><\/p>\n

Tout d’abord personne ne peut dire actuellement o\u00f9 se trouve exactement Philae \u00e0 la surface de 67P, il faudra donc se contenter de la zone propos\u00e9e lors de la conf\u00e9rence de presse du 13 novembre. Seule certitude : l’atterrisseur, qui a termin\u00e9 ses rebonds dans un secteur au relief tourment\u00e9, ne re\u00e7oit pas assez de lumi\u00e8re car il est \u00e0 l’ombre d’un rempart naturel (les scientifiques parlent d’une “falaise”) qui lui cache r\u00e9guli\u00e8rement le Soleil<\/a>. Si on y ajoute le fait qu’une partie des panneaux solaires est mal orient\u00e9e en raison de l’inclinaison de l’atterrisseur (lequel ne repose que sur 2 de ses 3 pieds), on peut craindre que Philae ne cesse ses activit\u00e9s dans les prochaines heures, quand il aura \u00e9puis\u00e9 l’\u00e9nergie de sa pile principale.<\/p>\n

\"esa1\"<\/a><\/p>\n

Malgr\u00e9 cet avenir incertain, la collecte des donn\u00e9es scientifiques se poursuit<\/strong> : analyse de la structure interne de la com\u00e8te <\/a>\u00e0 l’aide du radar Consert, mesure de la duret\u00e9 du sol avec l’instrument Mupus, \u00e9tude de la g\u00e9om\u00e9trie fine des grains \u00e0 la surface avec les cam\u00e9ras Rolis et Civa sont quelques-unes des exp\u00e9riences en cours. 67P a d\u00e9j\u00e0 offert une tr\u00e8s grosse surprise aux scientifiques : avec une surface o\u00f9 alternent des zones relativement lisses qui semblent recouvertes d’un gravier grossier et des r\u00e9gions rocheuses tr\u00e8s d\u00e9grad\u00e9es, Tchouri ne ressemble pas du tout aux autres noyaux com\u00e9taires<\/strong> qui ont re\u00e7u la visite de sondes dans le pass\u00e9.<\/p>\n

\"esa2\"<\/a><\/p>\n

Quel avenir pour Philae ?<\/strong> Il existe \u00e0 ce jour deux options : soit les techniciens tentent de faire bouger l’atterrisseur pour qu’il re\u00e7oive plus de lumi\u00e8re solaire, soit ils le font hiberner en attendant des jours meilleurs. En th\u00e9orie les moyens pour faire bouger Philae ne manquent pas : le propulseur de gaz froid, les harpons, la foreuse ou encore les bras des instruments Mupus ou Apxs pourraient \u00eatre utilis\u00e9s \u00e0 cette fin. Mais la prudence guidera peut-\u00eatre les ing\u00e9nieurs : la com\u00e8te 67P\/Churyumov-Gerasimenko se rapproche du Soleil <\/a>et dans quelques mois les panneaux solaires de Philae recevront une quantit\u00e9 de lumi\u00e8re beaucoup plus importante. L’ESA va donc devoir trancher rapidement, \u00e0 moins que Philae ne cesse de communiquer avec la Terre plus t\u00f4t que pr\u00e9vu…<\/p>\n","protected":false},"excerpt":{"rendered":"

Voici le point sur la situation 48 heures apr\u00e8s l’arriv\u00e9e mouvement\u00e9e de l’atterrisseur Philae \u00e0 la surface de la com\u00e8te 67P\/Churyumov-Gerasimenko. Tout d’abord personne ne peut dire actuellement o\u00f9 se trouve exactement Philae \u00e0 la surface de 67P, il faudra donc se contenter de la zone propos\u00e9e lors de la conf\u00e9rence de presse du 13 … Continuer la lecture de Philae : surprises et incertitudes<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":1146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[],"class_list":["post-1144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"yoast_head":"\nphilae<\/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\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"philae\" \/>\n<meta property=\"og:description\" content=\"Voici le point sur la situation 48 heures apr\u00e8s l’arriv\u00e9e mouvement\u00e9e de l’atterrisseur Philae \u00e0 la surface de la com\u00e8te 67P\/Churyumov-Gerasimenko. Tout d’abord personne ne peut dire actuellement o\u00f9 se trouve exactement Philae \u00e0 la surface de 67P, il faudra donc se contenter de la zone propos\u00e9e lors de la conf\u00e9rence de presse du 13 … Continuer la lecture de Philae : surprises et incertitudes →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2014-11-14T15:41:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-11-15T09:06:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"676\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\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\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/\",\"name\":\"philae\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg\",\"datePublished\":\"2014-11-14T15:41:44+00:00\",\"dateModified\":\"2014-11-15T09:06:41+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg\",\"width\":1200,\"height\":676},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\""J'ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles." Vincent van Gogh\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/?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\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\",\"name\":\"Jean-Baptiste FELDMANN\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"caption\":\"Jean-Baptiste FELDMANN\"},\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"philae","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\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/","og_locale":"fr_FR","og_type":"article","og_title":"philae","og_description":"Voici le point sur la situation 48 heures apr\u00e8s l’arriv\u00e9e mouvement\u00e9e de l’atterrisseur Philae \u00e0 la surface de la com\u00e8te 67P\/Churyumov-Gerasimenko. Tout d’abord personne ne peut dire actuellement o\u00f9 se trouve exactement Philae \u00e0 la surface de 67P, il faudra donc se contenter de la zone propos\u00e9e lors de la conf\u00e9rence de presse du 13 … Continuer la lecture de Philae : surprises et incertitudes →","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2014-11-14T15:41:44+00:00","article_modified_time":"2014-11-15T09:06:41+00:00","og_image":[{"width":1200,"height":676,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg","type":"image\/jpeg"}],"author":"Jean-Baptiste FELDMANN","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Jean-Baptiste FELDMANN","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/","name":"philae","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg","datePublished":"2014-11-14T15:41:44+00:00","dateModified":"2014-11-15T09:06:41+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/14\/philae-surprises-incertitudes\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/esa21.jpg","width":1200,"height":676},{"@type":"WebSite","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/","name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","description":""J'ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles." Vincent van Gogh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.futura-sciences.com\/feldmann\/?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\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea","name":"Jean-Baptiste FELDMANN","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","caption":"Jean-Baptiste FELDMANN"},"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/1144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/comments?post=1144"}],"version-history":[{"count":8,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/1144\/revisions"}],"predecessor-version":[{"id":1154,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/1144\/revisions\/1154"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/1146"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=1144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=1144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=1144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}