{"id":731,"date":"2026-07-04T13:43:00","date_gmt":"2026-07-04T11:43:00","guid":{"rendered":"https:\/\/www-new.ias.u-psud.fr\/?p=731"},"modified":"2026-09-25T13:18:43","modified_gmt":"2026-09-25T11:18:43","slug":"quest-ce-que-la-physique-du-systeme-solaire-et-des-systemes-planetaires","status":"publish","type":"post","link":"https:\/\/www.ias.u-psud.fr\/index.php\/2026\/07\/04\/quest-ce-que-la-physique-du-systeme-solaire-et-des-systemes-planetaires\/","title":{"rendered":"Qu&rsquo;est-ce que la Physique du syst\u00e8me solaire et des syst\u00e8mes plan\u00e9taires ?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"731\" class=\"elementor elementor-731\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-62fc4809 e-con-full e-flex e-con e-parent\" data-id=\"62fc4809\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-51b48f83 animated-slow elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"51b48f83\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;slideInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">QUESTIONS DE RECHERCHE<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-63f7b05 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"63f7b05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Qu&rsquo;est-ce que la Physique du syst\u00e8me solaire et des syst\u00e8mes plan\u00e9taires ?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e2a0a60 elementor-widget elementor-widget-theme-post-featured-image elementor-widget-image\" data-id=\"e2a0a60\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-featured-image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Planetologie IA generated\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI0MSwidXJsIjoiaHR0cHM6XC9cL3d3dy5pYXMudS1wc3VkLmZyXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI2XC8wN1wvUGxhbmV0b2xvZ2llLUlBLWdlbmVyYXRlZC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated-300x200.png\" class=\"attachment-medium size-medium wp-image-2241\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated-300x200.png 300w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated-1024x683.png 1024w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated-768x512.png 768w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/Planetologie-IA-generated.png 1536w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b178a1b e-con e-atomic-element e-flexbox-base e-b178a1b-70f1899 \" data-id=\"b178a1b\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"b178a1b\">\n    \t\t<div class=\"elementor-element elementor-element-03d94d6 elementor-widget elementor-widget-text-editor\" data-id=\"03d94d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La <strong>plan\u00e9tologie<\/strong> est une discipline scientifique d\u00e9di\u00e9e \u00e0 l\u2019\u00e9tude des <strong>plan\u00e8tes<\/strong>, <strong>satellites<\/strong>, <strong>petits corps<\/strong> (ast\u00e9ro\u00efdes, com\u00e8tes) et <strong>exoplan\u00e8tes<\/strong> (plan\u00e8tes en orbite autour d\u2019autres \u00e9toiles que le Soleil). Son objectif est de <strong>comprendre la formation, l\u2019\u00e9volution et les caract\u00e9ristiques physiques, chimiques et climatiques<\/strong> de ces objets, ainsi que leur <strong>potentiel \u00e0 abriter la vie<\/strong>.<\/p><p>Comme l\u2019explique <strong>Mathieu Vincendon<\/strong>, responsable de l&rsquo;\u00e9quipe Physique du syst\u00e8me solaire et des syst\u00e8mes plan\u00e9taires, cette discipline permet de <em>\u00ab caract\u00e9riser les propri\u00e9t\u00e9s des surfaces, atmosph\u00e8res et environnements des plan\u00e8tes et petits corps du syst\u00e8me solaire, ainsi que des exoplan\u00e8tes, pour comprendre leur formation, leur \u00e9volution, et leur potentiel \u00e0 abriter la vie. \u00bb<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-db7f09d e-con e-atomic-element e-flexbox-base e-db7f09d-8701421 \" data-id=\"db7f09d\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"db7f09d\">\n    \t\t<div class=\"elementor-element elementor-element-8d84221 elementor-widget elementor-widget-heading\" data-id=\"8d84221\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Fil conducteur : l\u2019\u00e9volution plan\u00e9taire<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-9ef5c38 e-con e-atomic-element e-flexbox-base e-9ef5c38-0ffe696 \" data-id=\"9ef5c38\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"9ef5c38\">\n    \t\t<div class=\"elementor-element elementor-element-6ca9649 elementor-widget elementor-widget-text-editor\" data-id=\"6ca9649\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\tLes recherches en plan\u00e9tologie s\u2019articulent autour de plusieurs axes majeurs :\n<ul>\n \t<li><strong>Origines de la diversit\u00e9 des objets solides<\/strong>\n \t<li><strong>\u00c9volution physico-chimique et climatique<\/strong><\/li>\n \t<li><strong>Sp\u00e9cificit\u00e9s du chemin suivi par la Terre<\/strong><\/li>\n \t<li><strong>Mesure de la composition des enveloppes externes<\/strong><\/li>\n \t<li><strong>\u00c9tude des plan\u00e8tes solides, satellites, petits corps et exoplan\u00e8tes<\/strong><\/li>\n \t<li><strong>D\u00e9veloppement et exploitation d&rsquo;instruments spatiaux<\/strong><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-43af7d6 e-con e-atomic-element e-flexbox-base e-43af7d6-72dbb88 \" data-id=\"43af7d6\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"43af7d6\">\n    \t\t<div class=\"elementor-element elementor-element-e3f782c elementor-widget elementor-widget-heading\" data-id=\"e3f782c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\n\n\nCibles privil\u00e9gi\u00e9es<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-a8f01bc e-con e-atomic-element e-flexbox-base e-a8f01bc-565f08c \" data-id=\"a8f01bc\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"a8f01bc\">\n    \t\t<div class=\"elementor-element elementor-element-1b3cc28 elementor-widget elementor-widget-text-editor\" data-id=\"1b3cc28\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>1. Les lunes glac\u00e9es de Jupiter et Saturne<\/strong><\/p><p>Un focus particulier est mis sur les <strong>lunes glac\u00e9es<\/strong>, comme <strong>Europe (Jupiter)<\/strong>, <strong>Ganym\u00e8de<\/strong>, <strong>Callisto<\/strong>, ou encore <strong>Encelade et Titan (Saturne)<\/strong>. Ces objets c\u00e9lestes abritent des <strong>oc\u00e9ans souterrains<\/strong> et des <strong>environnements extr\u00eames<\/strong> :<\/p><ul><li>Oc\u00e9ans souterrains : Exemple d\u2019Encelade, o\u00f9 des geysers remontent en surface, r\u00e9v\u00e9lant la pr\u00e9sence d\u2019eau liquide, de sels, de mati\u00e8re organique et de CO\u2082.<\/li><li>Mouvements internes : \u00c9tude des cellules de convection dans ces oc\u00e9ans.<\/li><li>Environnement extr\u00eame : Soumises \u00e0 des radiations intenses, ces lunes pourraient abriter des r\u00e9actions complexes propices \u00e0 l\u2019\u00e9mergence de mol\u00e9cules pr\u00e9biotiques.<\/li><\/ul><p><strong>2. Mars : la qu\u00eate de l\u2019eau et de la vie<\/strong><\/p><p>Mars est une cible majeure pour plusieurs raisons :<\/p><ul><li>Eau liquide : Pr\u00e9sence pass\u00e9e ou actuelle dans certaines r\u00e9gions. Exemple : Mission Mars Express (2004) : Premi\u00e8res mesures pour localiser les sites riches en eau sur Mars.<\/li><li>Mission europ\u00e9enne en pr\u00e9paration : Premier rover europ\u00e9en \u00e9quip\u00e9 d\u2019une foreuse de 2 m\u00e8tres (son fonctionnement reste incertain).<\/li><li><strong>Question cl\u00e9<\/strong> : Si la vie n\u2019existe pas sur Mars, quel facteur limite son apparition ?<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-39eae85 e-con e-atomic-element e-flexbox-base e-39eae85-54c11d1 \" data-id=\"39eae85\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"39eae85\">\n    \t\t<div class=\"elementor-element elementor-element-be1d3d6 elementor-widget elementor-widget-heading\" data-id=\"be1d3d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9thodes d\u2019analyse<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-555ecf2 e-con e-atomic-element e-flexbox-base e-555ecf2-341fd43 \" data-id=\"555ecf2\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"555ecf2\">\n    \t\t<div class=\"elementor-element elementor-element-39cb60a elementor-widget elementor-widget-text-editor\" data-id=\"39cb60a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pour \u00e9tudier ces objets, les chercheurs utilisent des <strong>techniques avanc\u00e9es<\/strong> :<\/p><ul><li><strong>Imagerie spectrale infrarouge<\/strong> :<ul><li><strong>Spectroscopie infrarouge<\/strong> : Analyse de la lumi\u00e8re du Soleil r\u00e9fl\u00e9chie par les plan\u00e8tes.<\/li><li><strong>Imageurs<\/strong> : Mesure du comportement de la lumi\u00e8re en fonction de la longueur d\u2019onde pour chaque pixel.<p>\u00a0<\/p><\/li><li><p><strong>Exemple concret sur Mars<\/strong> :<\/p><ul><li>En lumi\u00e8re visible : lave basaltique et poussi\u00e8re oxyd\u00e9e.<\/li><li>En infrarouge : Diff\u00e9rentes couleurs selon le type de roche, permettant d\u2019identifier leur composition.<\/li><\/ul><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-9566dfa e-con e-atomic-element e-flexbox-base e-9566dfa-51d4533 \" data-id=\"9566dfa\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"9566dfa\">\n    \t\t<div class=\"elementor-element elementor-element-413850c elementor-widget elementor-widget-heading\" data-id=\"413850c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Projets phares<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-adc42ff e-con e-atomic-element e-flexbox-base e-adc42ff-22c5b22 \" data-id=\"adc42ff\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"adc42ff\">\n    \t\t<div class=\"elementor-element elementor-element-cfc76df elementor-widget elementor-widget-text-editor\" data-id=\"cfc76df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"text-decoration: underline;\">Rover Europ\u00e9en sur Mars<\/span><\/p><ul><li><strong>Lancement<\/strong> : 2028.<\/li><li><strong>Atterrissage<\/strong> : 2030.<\/li><li style=\"list-style-type: none;\">\u00a0<\/li><\/ul><p>Le rover pr\u00e9l\u00e8ve des \u00e9chantillons sur un tapis roulant qui les am\u00e8ne \u00e0 <a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/2026\/08\/03\/micromega\/\" target=\"_blank\" rel=\"noopener\">Micromega<\/a>.<\/p><p>Les images en infrarouge capturent \u00e0 l&rsquo;\u00e9chelle des grains de poussi\u00e8re et de sable avec la possibilit\u00e9 d&rsquo;inclure en foreuse pour analyser les profondeurs.<\/p><p><span style=\"text-decoration: underline;\">Mission JUICE (JUpiter ICy moons Explorer)<\/span><\/p><ul><li><strong>Lancement<\/strong> : <strong>D\u00e9but 2023<\/strong> (arriv\u00e9e pr\u00e9vue en <strong>2031<\/strong>).<\/li><\/ul><p>Son objectif est d&rsquo;explorer les <strong>lunes glac\u00e9es de Jupiter<\/strong> (Europe, Ganym\u00e8de, Callisto).<\/p><p>Pour ce faire, elle va utiliser <a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/2026\/07\/31\/majis\/\" target=\"_blank\" rel=\"noopener\"><strong>MAJIS<\/strong><\/a> (instrument de l\u2019IAS) : <strong>Spectroscopie infrarouge \u00e0 -180\u00b0C<\/strong> pour analyser la composition des surfaces.<\/p><p>Les images obtenues en haute r\u00e9solution permettront d&rsquo;identifier des zones o\u00f9\u00a0la glace est mall\u00e9able (indices de mati\u00e8re organique ou de sels).<\/p><p>Les contraintes de radiations extr\u00eames sont \u00e0 prendre en compte dans la mesure o\u00f9 elles cr\u00e9ent un environnement hostile pour les astronautes et pourraient d\u00e9clencher des mol\u00e9cules pr\u00e9biotiques.<\/p><p><span style=\"text-decoration: underline;\">Mission ARIEL (Atmospheric Remote-sensing Infrared Exoplanet Large-survey)<\/span><\/p><p>L&rsquo;objectif est d&rsquo;effectuer <strong>la spectroscopie des atmosph\u00e8res d\u2019exoplan\u00e8tes depuis l\u2019orbite terrestre<\/strong>.<\/p><ul><li><strong>Partenariat<\/strong> : Collaboration avec <strong>AIM\/CEA<\/strong>.<\/li><\/ul><p>ARIEL a pour mission d&rsquo;\u00e9tudier la composition chimique des atmosph\u00e8res pour identifier des biosignatures potentielles.<\/p><p><span style=\"text-decoration: underline;\">Mission BepiColombo<\/span><\/p><p>Il s&rsquo;agit d&rsquo;un voyage de <strong>8 ans vers Mercure<\/strong>.<\/p><ul><li><strong>D\u00e9couverte cl\u00e9<\/strong> : Pr\u00e9sence de <strong>glace aux p\u00f4les de Mercure<\/strong> (zones \u00e0 l\u2019ombre permanente).<\/li><li><strong>Hypoth\u00e8se<\/strong> : L\u2019eau aurait \u00e9t\u00e9 apport\u00e9e par des com\u00e8tes et ast\u00e9ro\u00efdes, t\u00e9moins des d\u00e9buts du syst\u00e8me solaire.<\/li><li><strong>Montage<\/strong> : Double satellite (japonais et europ\u00e9en).<\/li><li><strong>D\u00e9crochage le 3 septembre 2026<\/strong> apr\u00e8s un voyage avec un syst\u00e8me de protection.<\/li><li><strong>Probl\u00e8me<\/strong> : Panneaux solaires endommag\u00e9s au fil du voyage.<\/li><li><strong>Derni\u00e8re pouss\u00e9e<\/strong> : R\u00e9ussie malgr\u00e9 les difficult\u00e9s.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-d9dd362 e-con e-atomic-element e-flexbox-base e-d9dd362-32b6293 \" data-id=\"d9dd362\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"d9dd362\">\n    \t\t<div class=\"elementor-element elementor-element-aa898ed elementor-widget elementor-widget-text-editor\" data-id=\"aa898ed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La plan\u00e9tologie permet gr\u00e2ce \u00e0 des <strong>missions spatiales ambitieuses<\/strong> et des <strong>instruments de pointe<\/strong> de <strong>repousser les limites de notre compr\u00e9hension de l\u2019Univers et par l\u00e0 m\u00eame les facteurs d&rsquo;apparition de la vie. <\/strong>Chaque projet, chaque observation, chaque analyse a pour but de nous rapprocher de la r\u00e9ponse\u00a0\u00e0 une question fondamentale : <em>Sommes-nous seuls dans l\u2019Univers ?<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-724e912 e-con-full e-flex e-con e-parent\" data-id=\"724e912\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-ef93bdb e-con-full e-flex e-con e-child\" data-id=\"ef93bdb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d0293f9 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"d0293f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">En savoir plus<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-411912b elementor-widget elementor-widget-text-editor\" data-id=\"411912b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.ias.u-psud.fr\/index.php\/physique-du-systeme-solaire-et-des-systemes-planetaires\/\" target=\"_blank\" rel=\"noopener\">L&rsquo;\u00e9quipe Physique du syst\u00e8me solaire et des syst\u00e8mes plan\u00e9taires<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>La plan\u00e9tologie est une discipline scientifique d\u00e9di\u00e9e \u00e0 l\u2019\u00e9tude des plan\u00e8tes, satellites, petits corps (ast\u00e9ro\u00efdes, com\u00e8tes) et exoplan\u00e8tes (plan\u00e8tes en orbite autour d\u2019autres \u00e9toiles que le Soleil). 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