{"id":12352,"date":"2020-08-12T10:36:25","date_gmt":"2020-08-12T10:36:25","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=12352"},"modified":"2020-08-29T16:37:44","modified_gmt":"2020-08-29T16:37:44","slug":"de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/","title":{"rendered":"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s"},"content":{"rendered":"

Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d’un oc\u00e9an souterrain.<\/strong><\/p>\n

Dawn \u00e0 l’assaut de C\u00e9r\u00e8s :<\/h5>\n

Avec 940 km de diam\u00e8tre,\u00a0C\u00e9r\u00e8s<\/a> est la plus petite plan\u00e8te naine connue. Situ\u00e9e au c\u0153ur de la ceinture d\u2019ast\u00e9ro\u00efdes, elle a \u00e9t\u00e9 d\u00e9couverte le 1er janvier 1801 par Giuseppe Piazzi. La sonde\u00a0Dawn<\/a><\/em> (lanc\u00e9e le 27 septembre 2007) a explor\u00e9 C\u00e9r\u00e8s de tr\u00e8s pr\u00e8s (35 km d’altitude) de f\u00e9vrier 2015 \u00e0 octobre 2018. Elle avait auparavant orbit\u00e9 autour de Vesta<\/a> entre juillet 2011 et septembre 2012. L’exploration de C\u00e9r\u00e8s a soulev\u00e9 de nombreuses interrogations. En particulier la pr\u00e9sence de 130 points lumineux a beaucoup intrigu\u00e9 les plan\u00e9tologues. C’\u00e9tait incongru et inexpliqu\u00e9 sur un astre aussi sombre que de l\u2019asphalte.<\/span><\/p>\n

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

Un grand nombre de ces taches brillantes sont pr\u00e9sentes dans le fond du crat\u00e8re Occator. C’est une excavation de 92 km de diam\u00e8tre et 4 km de profondeur. Au centre du crat\u00e8re se trouve un d\u00f4me. Il est recouvert d\u2019un myst\u00e9rieux mat\u00e9riau lumineux parcouru par de nombreuses crevasses qui partent du sommet (photo ci-dessus). <\/p>\n

Un oc\u00e9an de saumure :<\/h5>\n

Le r\u00e9sultat de plusieurs \u00e9tudes pr\u00e9sent\u00e9 par la NASA<\/a> permet d’\u00e9lucider ce myst\u00e8re. Sur C\u00e9r\u00e8s la chute de microm\u00e9t\u00e9orites assombrit peu \u00e0 peu le sol. On se doutait donc que les r\u00e9gions claires \u00e9taient assez jeunes. Les mesures r\u00e9alis\u00e9es par la sonde Dawn confirment que des d\u00e9p\u00f4ts riches en chlorure de sodium hydrat\u00e9 ont atteint la surface r\u00e9cemment. Ils proviendraient d’un oc\u00e9an de saumure souterrain. La chaleur de l’impact qui a form\u00e9 Occator il y a 20 millions d’ann\u00e9es et la formation de fissures pourraient expliquer la remont\u00e9e en surface de cette saumure.<\/p>\n

\"\"<\/a>
Cette image en fausses couleurs met en \u00e9vidence un d\u00e9p\u00f4t de saumure \u00e0 l’int\u00e9rieur du crat\u00e8re Occator sur la plan\u00e8te naine C\u00e9r\u00e8s. \u00a9 NASA\/JPL-Caltech\/UCLA\/MPS\/DLR\/IDA<\/figcaption><\/figure>\n

C’est la premi\u00e8re fois que l’hypoth\u00e8se d’un oc\u00e9an souterrain est envisag\u00e9e sur une plan\u00e8te naine. Et les plan\u00e9tologues se mettent \u00e0 r\u00eaver d’une mission d’exploration de C\u00e9r\u00e8s pour y rechercher des mol\u00e9cules organiques…<\/p>\n","protected":false},"excerpt":{"rendered":"

Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d’un oc\u00e9an souterrain. Dawn \u00e0 l’assaut de C\u00e9r\u00e8s : Avec 940 km de diam\u00e8tre,\u00a0C\u00e9r\u00e8s est la plus petite plan\u00e8te naine connue. Situ\u00e9e au c\u0153ur de la ceinture d\u2019ast\u00e9ro\u00efdes, elle a \u00e9t\u00e9 d\u00e9couverte le 1er janvier 1801 … Continuer la lecture de De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":12353,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[549,550],"class_list":["post-12352","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-ceres","tag-sonde-dawn"],"yoast_head":"\nDe la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s<\/title>\n<meta name=\"description\" content=\"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.\" \/>\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\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s\" \/>\n<meta property=\"og:description\" content=\"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2020-08-12T10:36:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-08-29T16:37:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1041\" \/>\n\t<meta property=\"og:image:height\" content=\"1301\" \/>\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\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\",\"name\":\"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg\",\"datePublished\":\"2020-08-12T10:36:25+00:00\",\"dateModified\":\"2020-08-29T16:37:44+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"description\":\"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg\",\"width\":1041,\"height\":1301,\"caption\":\"Cette image en fausses couleurs met en \u00e9vidence un d\u00e9p\u00f4t de saumure \u00e0 l'int\u00e9rieur du crat\u00e8re Occator sur la plan\u00e8te naine C\u00e9r\u00e8s. \u00a9 NASA\/JPL-Caltech\/UCLA\/MPS\/DLR\/IDA\"},{\"@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":"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s","description":"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.","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\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/","og_locale":"fr_FR","og_type":"article","og_title":"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s","og_description":"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2020-08-12T10:36:25+00:00","article_modified_time":"2020-08-29T16:37:44+00:00","og_image":[{"width":1041,"height":1301,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.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\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/","name":"De la saumure remonte \u00e0 la surface de la plan\u00e8te naine C\u00e9r\u00e8s","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg","datePublished":"2020-08-12T10:36:25+00:00","dateModified":"2020-08-29T16:37:44+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"description":"Occator, un crat\u00e8re situ\u00e9 sur C\u00e9r\u00e8s, commence \u00e0 livrer ses secrets. Son d\u00f4me central serait constitu\u00e9 de saumure provenant d'un oc\u00e9an souterrain.","inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/08\/occator.jpg","width":1041,"height":1301,"caption":"Cette image en fausses couleurs met en \u00e9vidence un d\u00e9p\u00f4t de saumure \u00e0 l'int\u00e9rieur du crat\u00e8re Occator sur la plan\u00e8te naine C\u00e9r\u00e8s. \u00a9 NASA\/JPL-Caltech\/UCLA\/MPS\/DLR\/IDA"},{"@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\/12352","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=12352"}],"version-history":[{"count":3,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/12352\/revisions"}],"predecessor-version":[{"id":12356,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/12352\/revisions\/12356"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/12353"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=12352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=12352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=12352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}