{"id":23227,"date":"2026-09-10T16:12:39","date_gmt":"2026-09-10T16:12:39","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=23227"},"modified":"2026-09-10T16:12:39","modified_gmt":"2026-09-10T16:12:39","slug":"vue-de-mars-la-lune-phobos-devant-le-soleil","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/09\/10\/vue-de-mars-la-lune-phobos-devant-le-soleil\/","title":{"rendered":"Vue de Mars, la lune Phobos devant le Soleil"},"content":{"rendered":"<p><strong>Le 12 ao\u00fbt dernier, le rover martien Perseverance a photographi\u00e9 un nouveau transit de la lune Phobos devant le Soleil.<\/strong><\/p>\n<h5>Petite lune martienne :<\/h5>\n<p>Phobos est un satellite naturel de moins de 30 kilom\u00e8tres de diam\u00e8tre. Tout comme son petit fr\u00e8re\u00a0<a href=\"https:\/\/fr.wikipedia.org\/wiki\/D%C3%A9imos_(lune)\" target=\"_blank\" rel=\"noopener\">Deimos<\/a>, il a \u00e9t\u00e9 d\u00e9couvert en 1877 par l\u2019astronome am\u00e9ricain\u00a0<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Asaph_Hall\" target=\"_blank\" rel=\"noopener\">Asaph Hall<\/a>. Orbitant \u00e0 6000 kilom\u00e8tres de la surface, il met un peu plus de sept heures \u00e0 effectuer une r\u00e9volution autour de\u00a0<a href=\"https:\/\/cnes.fr\/dossiers\/planete-mars\" target=\"_blank\" rel=\"noopener\">Mars<\/a>. \u00c0 sa surface, la gravit\u00e9 est si faible qu\u2019une balle lanc\u00e9e devant vous reviendrait dans votre dos ! Avec son orbite d\u00e9croissante, il finira par s\u2019\u00e9craser sur la plan\u00e8te dans une dizaine de millions d\u2019ann\u00e9es. Depuis <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Opportunity\" target=\"_blank\" rel=\"noopener\">Opportunity<\/a> en 2004, les rovers martiens photographient r\u00e9guli\u00e8rement le transit des deux lunes devant le <a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>. Cette fois-ci, c&#8217;est <a href=\"https:\/\/cnes.fr\/projets\/supercam\" target=\"_blank\" rel=\"noopener\">Perseverance<\/a>, depuis le <a href=\"https:\/\/lejournal.cnrs.fr\/articles\/mars-le-cratere-jezero-a-bien-ete-un-lac\" target=\"_blank\" rel=\"noopener\">crat\u00e8re Jezero<\/a>, qui a saisi la sc\u00e8ne le 12 ao\u00fbt 2026 :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos.jpg\" rel=\"lightbox[23227]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23228\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/09\/phobos.jpg 1198w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Souvenez-vous qu&#8217;\u00e0 cette m\u00eame date, de nombreux Terriens assistaient de leur c\u00f4t\u00e9 \u00e0 une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/08\/13\/coucher-de-soleil-eclipse-depuis-saint-jean-de-luz\/\" target=\"_blank\" rel=\"noopener\">remarquable \u00e9clipse solaire<\/a>. Et comme les Terriens, Perseverance s&#8217;est prot\u00e9g\u00e9 avec un filtre sp\u00e9cifique pour ne pas endommager le capteur de sa cam\u00e9ra <a href=\"https:\/\/mastcamz.asu.edu\/\" target=\"_blank\" rel=\"noopener\">Mastcam-Z<\/a>. Mais si les rovers photographient ces transits, ce n&#8217;est pas une lubie de scientifique. Les infimes variations de trajectoire mesur\u00e9es trahissent les effets de mar\u00e9e qui s&#8217;exercent entre les lunes et la plan\u00e8te. In fine, ces transits permettent de sonder indirectement l&#8217;int\u00e9rieur de Phobos, en attendant d&#8217;y poser le petit <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/06\/25\/en-video-la-folle-aventure-du-rover-idefix-sur-phobos\/\" target=\"_blank\" rel=\"noopener\">rover franco-allemand IDEFIX<\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/06\/25\/en-video-la-folle-aventure-du-rover-idefix-sur-phobos\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : la folle aventure du rover IDEFIX sur Phobos<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/12\/13\/heureux-qui-comme-curiosity-fait-un-beau-voyage-sur-mars\/\" target=\"_blank\" rel=\"noopener\">Heureux qui, comme Curiosity, fait un beau voyage sur Mars<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/01\/04\/planete-mars-decouvrez-les-etonnants-crateres-inverses\/\" target=\"_blank\" rel=\"noopener\">D\u2019o\u00f9 viennent les curieux crat\u00e8res invers\u00e9s sur Mars ?<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>.<\/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>Le 12 ao\u00fbt dernier, le rover martien Perseverance a photographi\u00e9 un nouveau transit de la lune Phobos devant le Soleil. Petite lune martienne : Phobos est un satellite naturel de moins de 30 kilom\u00e8tres de diam\u00e8tre. Tout comme son petit fr\u00e8re\u00a0Deimos, il a \u00e9t\u00e9 d\u00e9couvert en 1877 par l\u2019astronome am\u00e9ricain\u00a0Asaph Hall. Orbitant \u00e0 6000 kilom\u00e8tres &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/09\/10\/vue-de-mars-la-lune-phobos-devant-le-soleil\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Vue de Mars, la lune Phobos devant le Soleil<\/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":23228,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[4019,4018,2995,1081,3525],"class_list":["post-23227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-cratere-jezero","tag-mastcam-z","tag-perseverance","tag-phobos","tag-planete-mars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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