{"id":5248,"date":"2026-09-29T21:17:25","date_gmt":"2026-09-29T21:17:25","guid":{"rendered":"https:\/\/netguide.io\/news\/2026\/09\/29\/chaleur-cachee-a-linterieur-de-mars-moitie-sud-jusqua-400-degres-chaud-et-partiellement-fondu\/"},"modified":"2026-09-29T21:17:26","modified_gmt":"2026-09-29T21:17:26","slug":"chaleur-cachee-a-linterieur-de-mars-moitie-sud-jusqua-400-degres-chaud-et-partiellement-fondu","status":"publish","type":"post","link":"https:\/\/netguide.io\/news\/fr\/2026\/09\/29\/chaleur-cachee-a-linterieur-de-mars-moitie-sud-jusqua-400-degres-chaud-et-partiellement-fondu\/","title":{"rendered":"Chaleur cach\u00e9e \u00e0 l&#8217;int\u00e9rieur de Mars: moiti\u00e9 sud jusqu&#8217;\u00e0 400 degr\u00e9s chaud et partiellement fondu"},"content":{"rendered":"<div id=\"netgu-2272365934\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><p class=\"wp-block-paragraph\"><strong>Mars est beaucoup moins \u00e9quilibr\u00e9 que les chercheurs longtemps suppos\u00e9s: au fond de la plan\u00e8te se trouve une \u00e9norme fracture de temp\u00e9rature. Selon une nouvelle \u00e9tude, la moiti\u00e9 sud de la plan\u00e8te rouge est d&#8217;environ 200 \u00e0 400 degr\u00e9s Celsius plus chaude que le nord \u2013 et m\u00eame partiellement fondue dans des endroits.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">La d\u00e9couverte provient d&#8217;une \u00e9quipe dirig\u00e9e par Alexander Berne, qui a commenc\u00e9 les travaux pendant son doctorat \u00e0 l&#8217;Institut de technologie de Californie (Caltech) et qui fait maintenant des recherches \u00e0 l&#8217;Universit\u00e9 de l&#8217;Arizona. Des experts de l&#8217;Universit\u00e9 Brown et de la NASA y ont \u00e9galement particip\u00e9. Les r\u00e9sultats sont parus le 27 ao\u00fbt 2026 dans le journal <em>Nature<\/em>.<\/p><div id=\"netgu-1062730186\" class=\"netgu-content netgu-entity-placement\"><aside class=\"deals-top deals-top--compact\">\n\n\t\t\t<h3 class=\"deals-top__title\">Top-Deals<\/h3>\n\t\n\t\t\t<ul class=\"deals-top__list\">\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/moon-knight-digital-watch-face-fuer-wear-os-4\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/deal-27-150x150.png\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">MOON KNIGHT Digital Watch Face f\u00fcr Wear OS 4+<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>0.89 \u20ac<\/s>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-100%<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t55\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/train-sim-world-7-starter-pack-kostenlos-fuer-ps4-ps5-xbox-pc\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/capsule_616x353-11-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Train Sim World 7: Starter Pack kostenlos f\u00fcr PS4, PS5, Xbox, PC<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t55\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/ml2u-watchfaces-fuer-wearos-im-google-play-store-2\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/2844734_1-150x150.webp\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">ML2U Watchfaces f\u00fcr WearOS im Google Play Store<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<s>1.39 \u20ac<\/s>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-discount\">-100%<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t54\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/kostenloses-dlc-bundle-fuer-gears-of-war-e-day-liquid-death-bundle\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/2844571_1-150x150.webp\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Kostenloses DLC-Bundle f\u00fcr Gears of War E-Day \u2013 Liquid Death Bundle<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t54\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/kostenlose-emote-im-clash-royale-store\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/share-image-clashroyale-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Kostenlose Emote im Clash Royale-Store<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t54\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t<\/ul>\n\n\t\t\t\t\t<p class=\"deals-top__more\">\n\t\t\t\t<a href=\"https:\/\/netguide.io\/deals\/\">Alle Deals ansehen \u2192<\/a>\n\t\t\t<\/p>\n\t\t\t<\/aside>\n<\/div>\n\n<h3 class=\"wp-block-heading\">Mesur\u00e9 sur des d\u00e9cennies \u00e0 partir des donn\u00e9es de gravit\u00e9<\/h3>\n\n<p class=\"wp-block-paragraph\">Pour sonder la plan\u00e8te, l&#8217;\u00e9quipe a utilis\u00e9 une m\u00e9thode appel\u00e9e tomographie de mar\u00e9e. Les chercheurs ont analys\u00e9 de minuscules variations de vitesse dans trois orbites de Mars \u2013 Mars Global Surveyor, Mars Odyssey et Mars Reconnaissance Orbiter \u2013 qui ont entour\u00e9 la plan\u00e8te pendant des d\u00e9cennies. De la minute des variations dans le champ de gravit\u00e9, ils ont reconstruit la structure int\u00e9rieure. Les donn\u00e9es sismiques de la mission d&#8217;atterrissage InSight appuient l&#8217;image d&#8217;une moiti\u00e9 sud plus chaude.<\/p>\n\n<h3 class=\"wp-block-heading\">Pourquoi il pourrait r\u00e9soudre plusieurs puzzles Mars<\/h3>\n\n<p class=\"wp-block-paragraph\">L&#8217;asym\u00e9trie pourrait \u00e9clairer plusieurs questions de longue date : le magn\u00e9tisme inhabituel de la plan\u00e8te, son comportement sismique et les indices de son histoire de l&#8217;eau. Cependant, la source de chaleur reste ouverte. Les candidats d\u00e9battus comprennent un impact g\u00e9ant dans le nord, des d\u00e9bits de manteau croissants dans le sud, ou des couches rocheuses \u00e9paisses pi\u00e9geant la chaleur.<\/p>\n\n<h3 class=\"wp-block-heading\">Un mod\u00e8le, pas un regard direct<\/h3>\n\n<p class=\"wp-block-paragraph\">Une mise en garde importante : ce sont des inf\u00e9rences bas\u00e9es sur des mod\u00e8les tir\u00e9es de donn\u00e9es gravim\u00e9triques et sismiques, et non une mesure directe \u00e0 l&#8217;int\u00e9rieur de la plan\u00e8te. Berne souligne que les scientifiques supposent g\u00e9n\u00e9ralement que les int\u00e9rieurs plan\u00e9taires sont largement sph\u00e9riques sym\u00e9triques \u2013 Mars montre qu&#8217;il n&#8217;est pas n\u00e9cessaire d&#8217;\u00eatre vrai. Pour l&#8217;instant, la cause du foss\u00e9 demeure une question ouverte.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Sources :<\/strong> <a href=\"https:\/\/www.caltech.edu\/about\/news\/thermal-anomaly-discovered-below-marss-south-pole\" rel=\"noopener\" target=\"_blank\">Caltech (communiqu\u00e9 de presse)<\/a>, <a href=\"https:\/\/phys.org\/news\/2026-08-thermal-anomaly-mars-south-pole.html\" rel=\"noopener\" target=\"_blank\">phys.org<\/a>, <a href=\"https:\/\/www.sciencedaily.com\/releases\/2026\/08\/260828082336.htm\" rel=\"noopener\" target=\"_blank\">ScienceDaily<\/a> (\u00e9tude <em>Nature<\/em>, 27 ao\u00fbt 2026).<\/p><div id=\"netgu-3571703003\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Une \u00e9tude de Caltech dans la nature r\u00e9v\u00e8le une \u00e9norme fracture de temp\u00e9rature \u00e0 l&#8217;int\u00e9rieur de Mars : la moiti\u00e9 sud coule de 200 \u00e0 400 degr\u00e9s plus chaud que le nord et est partiellement fondue.<\/p>\n","protected":false},"author":1,"featured_media":1999,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[],"tags":[],"class_list":["post-5248","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/comments?post=5248"}],"version-history":[{"count":1,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5248\/revisions"}],"predecessor-version":[{"id":5249,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5248\/revisions\/5249"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media\/1999"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media?parent=5248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/categories?post=5248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/tags?post=5248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}