{"id":8136,"date":"2015-09-20T00:00:42","date_gmt":"2015-09-19T22:00:42","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=8136"},"modified":"2015-09-09T16:43:17","modified_gmt":"2015-09-09T14:43:17","slug":"un-ocean-plus-vaste-que-ceux-de-la-terre-sur-ganymede-une-lune-de-jupiter","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/un-ocean-plus-vaste-que-ceux-de-la-terre-sur-ganymede-une-lune-de-jupiter\/","title":{"rendered":"Un oc\u00e9an plus vaste que ceux de la Terre sur Ganym\u00e8de, une lune de Jupiter"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p style=\"text-align: justify;\">Des donn\u00e9es recueillies par Hubble attestent l&rsquo;existence, sous la cro\u00fbte de Ganym\u00e8de, d&rsquo;un oc\u00e9an d&rsquo;eau sal\u00e9e profond de cent kilom\u00e8tres. Une d\u00e9couverte qui renforce la probabilit\u00e9 d&rsquo;une vie extraterrestre.<\/p>\n<p style=\"text-align: justify;\">Dans l&rsquo;espace, un oc\u00e9an d&rsquo;eau sal\u00e9e plus vaste que tous ceux de la Terre r\u00e9unis. C&rsquo;est la d\u00e9couverte que vient de faire la Nasa. Selon les donn\u00e9es recueillies par le t\u00e9l\u00e9scope spatial Hubble, Ganym\u00e8de, la plus grosse lune de Jupiter et du syst\u00e8me solaire, contient de colossales r\u00e9serves d&rsquo;eau sous son \u00e9paisse cro\u00fbte glac\u00e9e.<\/p>\n<p style=\"text-align: justify;\">D&rsquo;une profondeur de cent kilom\u00e8tres<br \/>\n\u00ab\u00a0Un oc\u00e9an profond sous la croute glac\u00e9e de Ganym\u00e8de ouvre encore plus de possibilit\u00e9s exaltantes quant \u00e0 l&rsquo;existence de la vie au-del\u00e0 de la Terre\u00a0\u00bb, a jug\u00e9 John Grunsfeld, responsable de la recherche scientifique de la Nasa, estimant que cette d\u00e9couverte marquait \u00ab\u00a0une \u00e9tape significative\u00a0\u00bb.<\/p>\n<p style=\"text-align: justify;\">Selon les scientifiques, cet oc\u00e9an a une profondeur de cent kilom\u00e8tres, dix fois plus que ceux de la Terre, et est enterr\u00e9 sous une cro\u00fbte de 150 kilom\u00e8tres form\u00e9e pour l&rsquo;essentiel de glace. \u00ab\u00a0Nous pensons que dans un lointain pass\u00e9, cet oc\u00e9an a m\u00eame pu communiquer avec la surface\u00a0\u00bb, a expliqu\u00e9 Jim Green, le directeur de la division science plan\u00e9taire.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p style=\"text-align: justify;\"><a href=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"8138\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/un-ocean-plus-vaste-que-ceux-de-la-terre-sur-ganymede-une-lune-de-jupiter\/ganymede\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png?fit=500%2C304&amp;ssl=1\" data-orig-size=\"500,304\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Ganymede\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png?fit=500%2C304&amp;ssl=1\" class=\"alignnone size-full wp-image-8138\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png?resize=500%2C304\" alt=\"Ganymede\" width=\"500\" height=\"304\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png?w=500&amp;ssl=1 500w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/Ganymede.png?resize=300%2C182&amp;ssl=1 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">Detect\u00e9 gr\u00e2ce aux aurores bor\u00e9ales<\/p>\n<p style=\"text-align: justify;\">La sonde Galil\u00e9e, qui a \u00e9tudi\u00e9 Jupiter et ses nombreuses lunes pendant huit ans pour la Nasa, avait effectu\u00e9 six survols rapproch\u00e9s de Ganym\u00e8de, d\u00e9tectant un champ magn\u00e9tique en 2002. Cela avait \u00e9t\u00e9 la premi\u00e8re indication confortant l&rsquo;hypoth\u00e8se de l&rsquo;existence d&rsquo;un oc\u00e9an, mais ses observations avaient \u00e9t\u00e9 trop br\u00e8ves pour le confirmer compl\u00e8tement.<\/p>\n<p style=\"text-align: justify;\">Les nouvelles observations avec Hubble, faites \u00e0 partir des rayonnements ultraviolets, ont permis de d\u00e9tecter et d&rsquo;\u00e9tudier des aurores bor\u00e9ales dans les r\u00e9gions polaires de Ganym\u00e8de, qui sont provoqu\u00e9es par le champ magn\u00e9tique, comme sur la Terre. Chaque fois que le champ magn\u00e9tique de Jupiter change, les aurores bor\u00e9ales sur Ganym\u00e8de changent aussi.<\/p>\n<p style=\"text-align: justify;\">C&rsquo;est en observant ce mouvement des aurores bor\u00e9ales que les scientifiques ont d\u00e9termin\u00e9 l&rsquo;existence de l&rsquo;oc\u00e9an. Celui-ci affecte le champ magn\u00e9tique de Ganym\u00e8de, \u00e9tant donn\u00e9 que l&rsquo;eau sal\u00e9e est conductrice d&rsquo;\u00e9lectricit\u00e9.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.laterredufutur.com\/accueil\/\" target=\"_blank\">TDF<\/a><\/p>\n<p style=\"text-align: justify;\">source : <a href=\"http:\/\/www.lexpress.fr\/\" target=\"_blank\">http:\/\/www.lexpress.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"8136\">(370)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Des donn\u00e9es recueillies par Hubble attestent l&rsquo;existence, sous la cro\u00fbte de Ganym\u00e8de, d&rsquo;un oc\u00e9an d&rsquo;eau sal\u00e9e profond de cent kilom\u00e8tres&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":8137,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22],"tags":[333,117,4683,267,124,241,1498,363,75],"class_list":["post-8136","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-eau","tag-espace","tag-ganymede","tag-glace","tag-jupiter","tag-ocean","tag-salee","tag-systeme-solaire","tag-terre","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/09\/lune-ganymede-possede-un-ocean-sale.jpg?fit=930%2C493&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-27e","jetpack-related-posts":[{"id":13801,"url":"https:\/\/www.laterredufutur.com\/accueil\/notre-systeme-solaire-contient-des-oceans-partout\/","url_meta":{"origin":8136,"position":0},"title":"Notre syst\u00e8me solaire contient des oc\u00e9ans partout","author":"Admin","date":"7 novembre 2016","format":false,"excerpt":"De tout temps, l\u2019Homme a toujours cru que la Terre et ses oc\u00e9ans en faisaient un lieu tout \u00e0 fait exceptionnel, il avait raison. Par la vie \u00a0qui s\u2019est d\u00e9velopp\u00e9e sur notre plan\u00e8te, notre berceau est fantastique. Cependant toute cette eau qui a baign\u00e9 les \u00e9l\u00e9ments de cette vie est\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/ocean.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/ocean.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/ocean.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/ocean.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/ocean.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":25240,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-telescope-james-webb-decouvre-une-signature-potentielle-de-vie-sur-la-lune-glacee-de-jupiter-europe\/","url_meta":{"origin":8136,"position":1},"title":"Le t\u00e9lescope James Webb d\u00e9couvre une signature potentielle de vie sur la lune glac\u00e9e de Jupiter, Europe","author":"Admin","date":"29 septembre 2023","format":false,"excerpt":"La d\u00e9couverte de dioxyde de carbone apparemment produit sur cette lune sugg\u00e8re que l'oc\u00e9an glac\u00e9 d'Europe pourrait \u00eatre habitable. Le t\u00e9lescope spatial James Webb (JWST) de la NASA a r\u00e9v\u00e9l\u00e9 la pr\u00e9sence de dioxyde de carbone artificiel sur la lune glac\u00e9e de Jupiter, ce qui soul\u00e8ve la possibilit\u00e9 que ce\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/lune-europe.webp?fit=970%2C546&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/lune-europe.webp?fit=970%2C546&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/lune-europe.webp?fit=970%2C546&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/lune-europe.webp?fit=970%2C546&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":13412,"url":"https:\/\/www.laterredufutur.com\/accueil\/objectif-europe-revelations-de-la-nasa\/","url_meta":{"origin":8136,"position":2},"title":"Objectif Europe, r\u00e9v\u00e9lations de la NASA ?","author":"Admin","date":"23 septembre 2016","format":false,"excerpt":"Le 26 septembre 2016, la Nasa va tenir une conf\u00e9rence de presse pour pr\u00e9senter les r\u00e9sultats des analyses du t\u00e9lescope spatial Hubble. Elle a assur\u00e9 avoir une r\u00e9v\u00e9lation surprenante \u00e0 faire concernant Europe, l\u2019un des satellites de Jupiter. Jupiter poss\u00e8de en plus d\u2019Europe, trois autres satellites galil\u00e9ens : Ganym\u00e8de, Io\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2014\/11\/.._photos_europe2.jpg?fit=450%2C466&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":24340,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dune-probable-planete-ocean\/","url_meta":{"origin":8136,"position":3},"title":"D\u00e9couverte d&rsquo;une probable plan\u00e8te oc\u00e9an","author":"Admin","date":"27 ao\u00fbt 2022","format":false,"excerpt":"Elle serait ainsi enti\u00e8rement recouverte d'une \u00e9paisse couche d'eau. Si on sait que l\u2019eau liquide est essentielle au d\u00e9veloppement de la vie, il est beaucoup trop t\u00f4t pour se prononcer sur la potentielle pr\u00e9sence de vie sur cette exoplan\u00e8te. TOI-1452 b est une exoplan\u00e8te en orbite autour d'une des deux\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-ocean.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-ocean.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-ocean.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-ocean.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-ocean.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":2317,"url":"https:\/\/www.laterredufutur.com\/accueil\/objectif-europe\/","url_meta":{"origin":8136,"position":4},"title":"Objectif Europe","author":"Admin","date":"30 novembre 2014","format":false,"excerpt":"Et si la plan\u00e8te la plus passionnante n'\u00e9tait plus Mars mais plut\u00f4t une Lune de Jupiter ? C'est ce qui semble se dessiner de plus en plus si on analyse la situation de cette lune.\u00a0Les scientifiques sont assez confiants : la 6e lune de Jupiter, Europe, abriterait un vaste oc\u00e9an\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2014\/11\/.._photos_europe1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":15012,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-annonce-quune-des-lunes-de-saturne-pourrait-abriter-la-vie-extraterrestre\/","url_meta":{"origin":8136,"position":5},"title":"La Nasa annonce qu\u2019une des lunes de Saturne pourrait abriter la vie extraterrestre","author":"Admin","date":"13 avril 2017","format":false,"excerpt":"L'agence am\u00e9ricaine a pr\u00e9sent\u00e9 ses derni\u00e8res d\u00e9couvertes, jeudi... La Nasa a d\u00e9couvert de l\u2019hydrog\u00e8ne dans les geysers \u00e0 la surface d\u2019Encelade, l\u2019une des satellites de Saturne, qui pr\u00e9sente des conditions propices \u00e0 l'\u00e9tablissement de la vie. La recherche de la vie ailleurs dans le syst\u00e8me solaire progresse \u00e0 petits pas,\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/encelade1.jpg?fit=900%2C506&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/encelade1.jpg?fit=900%2C506&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/encelade1.jpg?fit=900%2C506&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/encelade1.jpg?fit=900%2C506&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8136","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=8136"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8136\/revisions"}],"predecessor-version":[{"id":8139,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8136\/revisions\/8139"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/8137"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=8136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=8136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=8136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}