{"id":1345,"date":"2026-05-24T02:30:56","date_gmt":"2026-05-24T02:30:56","guid":{"rendered":"https:\/\/artia13.city\/?p=1345"},"modified":"2026-05-24T02:30:56","modified_gmt":"2026-05-24T02:30:56","slug":"le-drone-dragonfly-de-la-nasa-se-prepare-a-explorer-titan-lune-de-saturne","status":"publish","type":"post","link":"https:\/\/artia13.city\/?p=1345","title":{"rendered":"Le drone Dragonfly de la NASA se pr\u00e9pare \u00e0 explorer Titan, lune de Saturne."},"content":{"rendered":"<figure> <img decoding=\"async\" src=\"https:\/\/www.sciencesetavenir.fr\/assets\/img\/2026\/04\/23\/cover-r4x3w1200-69ea10e6d181b-12390-694596-k2-k1-1654625-jpg.jpg\" alt=\"Le drone de la Nasa Dragonfly se pr\u00e9pare pour Titan\" loading=\"lazy\"> <\/figure><p><strong>EXPLORATION.<\/strong> La construction du drone h\u00e9licopt\u00e8re Dragonfly a officiellement d\u00e9but\u00e9 au centre Johns-Hopkins de la NASA, situ\u00e9 dans le Maryland, aux \u00c9tats-Unis. De la taille d&rsquo;une voiture, cet engin est pr\u00e9vu pour \u00eatre lanc\u00e9 \u00e0 l&rsquo;\u00e9t\u00e9 2028, entamant un voyage de six ans vers Titan, la plus grande lune de Saturne.<\/p><p><strong>Propulsion nucl\u00e9aire<\/strong><\/p><p>\u00c9quip\u00e9 d&rsquo;une propulsion nucl\u00e9aire, Dragonfly explorera divers sites sur Titan pour \u00e9tudier sa chimie, sa g\u00e9ologie et son atmosph\u00e8re. L&rsquo;objectif est de mieux comprendre les origines chimiques de la vie.<\/p><p><strong>OCEAN.<\/strong> Une \u00e9tude de 2025 remet en question l&rsquo;existence d&rsquo;un vaste oc\u00e9an liquide sous la surface de Titan. En analysant les donn\u00e9es de la sonde Cassini, des chercheurs de la NASA ont constat\u00e9 que les d\u00e9formations de Titan, caus\u00e9es par l&rsquo;attraction gravitationnelle de Saturne, pr\u00e9sentent un retard d&rsquo;environ 15 heures. Ce d\u00e9calage semble incompatible avec la pr\u00e9sence d&rsquo;un oc\u00e9an global d&rsquo;eau liquide, mais coh\u00e9rent avec une couche interne de glace chaude partiellement fondue. Publi\u00e9s dans la revue <em>Nature<\/em>, ces travaux sugg\u00e8rent que Titan pourrait abriter d&rsquo;immenses poches d&rsquo;eau enfouies entre 170 et 550 kilom\u00e8tres de profondeur. Selon les chercheurs, ces r\u00e9servoirs pourraient offrir des conditions favorables \u00e0 l&rsquo;\u00e9mergence de la vie, en concentrant nutriments et sources d&rsquo;\u00e9nergie. Ces r\u00e9sultats pourraient \u00e9galement orienter la future mission Dragonfly de la NASA.<\/p><p>Source : Sciences et Avenir.<\/p><figcaption><a href=\"https:\/\/www.sciencesetavenir.fr\/espace\/exploration\/le-drone-de-la-nasa-dragonfly-se-prepare-pour-titan_192081?xtor=RSS-9\">Source<\/a><\/figcaption>","protected":false},"excerpt":{"rendered":"<p>EXPLORATION. La construction du drone&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1346,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-1345","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astrologie-et-science"],"_links":{"self":[{"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/posts\/1345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/artia13.city\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1345"}],"version-history":[{"count":0,"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/posts\/1345\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/artia13.city\/index.php?rest_route=\/wp\/v2\/media\/1346"}],"wp:attachment":[{"href":"https:\/\/artia13.city\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artia13.city\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artia13.city\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}