{"id":7156,"date":"2017-02-07T17:17:12","date_gmt":"2017-02-07T17:17:12","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=7156"},"modified":"2017-02-12T13:19:45","modified_gmt":"2017-02-12T13:19:45","slug":"quand-ganymede-passe-derriere-jupiter","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/","title":{"rendered":"Quand Ganym\u00e8de passe derri\u00e8re Jupiter"},"content":{"rendered":"<p><strong>En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.<\/strong><\/p>\n<p>Le 7 avril prochain la plan\u00e8te gazeuse g\u00e9ante\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/19\/dernier-quartier-de-lune-au-dessus-de-jupiter-et-de-spica\/\" target=\"_blank\">Jupiter<\/a> sera \u00e0 l&#8217;opposition (alignement Soleil-Terre-Jupiter) \u00e0 une distance de 666,3 millions de km, avec un diam\u00e8tre apparent de 44,3\u2033 et une magnitude -2,5.<\/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\/x39n69k\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>Cette plan\u00e8te est toujours tr\u00e8s suivie par les astronomes, qu\u2019ils soient amateurs ou professionnels, et ce pour deux raisons : d\u2019une part son diam\u00e8tre apparent est le plus important de toutes les plan\u00e8tes du Syst\u00e8me solaire et d\u2019autre part il y a toujours quelque chose \u00e0 admirer \u00e0 sa surface (bandes gazeuses et passage de la <a href=\"http:\/\/www.futura-sciences.com\/videos\/d\/jupiter-saisissantes-images-grande-tache-rouge-2986\/\" target=\"_blank\">Grande Tache Rouge<\/a> comme sur l\u2019image ci-dessous) ou autour (ballet des 4 principaux satellites qui sont Io, <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/11\/image-fascinante-du-satellite-europe\/\" target=\"_blank\">Europe<\/a>, Ganym\u00e8de et <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/30\/callisto-occulte-io\/\" target=\"_blank\">Callisto<\/a>).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg\" rel=\"lightbox[7156]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7157\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de-450x312.jpg\" alt=\"\" width=\"450\" height=\"312\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de-450x312.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de-768x532.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de-1024x709.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg 1300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Cette image r\u00e9alis\u00e9e par le <a href=\"http:\/\/hubblesite.org\/\" target=\"_blank\">t\u00e9lescope spatial Hubble<\/a> nous donne l&#8217;occasion de nous int\u00e9resser aujourd&#8217;hui \u00e0 Ganym\u00e8de.<!--more--><\/p>\n<p>En partant de Jupiter Ganym\u00e8de est le troisi\u00e8me satellite galil\u00e9en. Il fut observ\u00e9 pour la premi\u00e8re fois (avec Io) le 7 janvier 1610 \u00e0 Padoue par <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/06\/galilee-le-savant-qui-a-ouvert-nos-yeux-sur-lunivers\/\" target=\"_blank\">Galil\u00e9e<\/a> \u00e0 l&#8217;aide d&#8217;une lunette astronomique. Cette lune fut ensuite \u00e9tudi\u00e9e de pr\u00e8s par les sondes Pioneer 10 (d\u00e9cembre 1973) puis Voyager (1979) et Galileo (1995-2002).<\/p>\n<p>Quand on scrute la surface de Ganym\u00e8de on constate que cette lune est recouverte pour un tiers par des r\u00e9gions sombres tr\u00e8s anciennes fortement crat\u00e9ris\u00e9es, et par des r\u00e9gions plus claires et plus jeunes travers\u00e9es par de profonds sillons que les scientifiques ont du mal \u00e0 expliquer.<\/p>\n<p>En observant les anomalies dans l&#8217;oscillation des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/12\/12\/nouveau-trou-coronal-declenche-aurores-polaires\/\" target=\"_blank\">aurores polaires<\/a>\u00a0autour des p\u00f4les de Ganym\u00e8de, des scientifiques en ont conclu qu&#8217;il devait exister sous la surface de cette lune un oc\u00e9an sal\u00e9 de 100 km de profondeur, une quantit\u00e9 d&#8217;eau sup\u00e9rieure \u00e0 celle des oc\u00e9ans terrestres !<\/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>En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9. Le 7 avril prochain la plan\u00e8te gazeuse g\u00e9ante\u00a0Jupiter sera \u00e0 l&#8217;opposition (alignement Soleil-Terre-Jupiter) \u00e0 une distance de 666,3 millions de km, avec un diam\u00e8tre apparent de 44,3\u2033 et une magnitude -2,5. &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Quand Ganym\u00e8de passe derri\u00e8re Jupiter<\/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":7157,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1906,158,414,90,82,568,1930,2033,543,544],"class_list":["post-7156","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-aurores-polaires","tag-galilee","tag-ganymede","tag-jupiter","tag-lune","tag-satellite","tag-sonde-galileo","tag-sonde-pioneer-10","tag-sonde-voyager","tag-telescope-spatial-hubble"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quand Ganym\u00e8de passe derri\u00e8re Jupiter<\/title>\n<meta name=\"description\" content=\"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.\" \/>\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\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quand Ganym\u00e8de passe derri\u00e8re Jupiter\" \/>\n<meta property=\"og:description\" content=\"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2017-02-07T17:17:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-02-12T13:19:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1300\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\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\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\",\"name\":\"Quand Ganym\u00e8de passe derri\u00e8re Jupiter\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg\",\"datePublished\":\"2017-02-07T17:17:12+00:00\",\"dateModified\":\"2017-02-12T13:19:45+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"description\":\"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg\",\"width\":1300,\"height\":900},{\"@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\":\"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  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":"Quand Ganym\u00e8de passe derri\u00e8re Jupiter","description":"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.","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\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/","og_locale":"fr_FR","og_type":"article","og_title":"Quand Ganym\u00e8de passe derri\u00e8re Jupiter","og_description":"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2017-02-07T17:17:12+00:00","article_modified_time":"2017-02-12T13:19:45+00:00","og_image":[{"width":1300,"height":900,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.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\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/","name":"Quand Ganym\u00e8de passe derri\u00e8re Jupiter","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg","datePublished":"2017-02-07T17:17:12+00:00","dateModified":"2017-02-12T13:19:45+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"description":"En observant Jupiter avec une longue-vue en 1610, le savant italien Galil\u00e9e d\u00e9couvrit 4 satellites dont Ganym\u00e8de, une lune qui cache un oc\u00e9an sal\u00e9.","inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/02\/07\/quand-ganymede-passe-derriere-jupiter\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/ganym\u00e8de.jpg","width":1300,"height":900},{"@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":"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  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\/7156","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=7156"}],"version-history":[{"count":6,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/7156\/revisions"}],"predecessor-version":[{"id":7276,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/7156\/revisions\/7276"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/7157"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=7156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=7156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=7156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}