{"id":792,"date":"2025-05-21T15:11:30","date_gmt":"2025-05-21T13:11:30","guid":{"rendered":"https:\/\/astresetplanetes.fr\/site\/?p=792"},"modified":"2025-05-21T15:11:30","modified_gmt":"2025-05-21T13:11:30","slug":"mars-le-rubis-du-ciel","status":"publish","type":"post","link":"https:\/\/astresetplanetes.fr\/site\/mars-le-rubis-du-ciel\/","title":{"rendered":"Mars, le rubis du ciel"},"content":{"rendered":"\n<p class=\"has-ast-global-color-3-color has-text-color has-link-color has-medium-font-size wp-elements-95625610e419a370775d6465a2ff7f74\"><strong>Introduction <\/strong>:  D\u00e8s l&rsquo;antiquit\u00e9, la vif couleur rouge de la plan\u00e8te a rendu curieux beaucoup de personnes. Les Anciens pensaient qu&rsquo;il s&rsquo;y d\u00e9roulait de sanglants combats. Les Grecs d\u00e9di\u00e8rent le nom de la plan\u00e8te \u00e0 leur dieu de la guerre, appel\u00e9 Mars chez les Romains. On sait aujourd&rsquo;hui que cette couleur vient du sable qui recouvre une grande partie de la plan\u00e8te.<\/p>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-14ac197a alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<figure class=\"wp-block-image size-large\"><img width=\"1024\" height=\"576\"  alt=\"Detailed image of Mars highlighting surface features against a black space background.\" class=\"wp-image-793 lws-optimize-lazyload\"\/ data-src=\"https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-1024x576.jpg\" srcset=\"https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-1024x576.jpg 1024w, https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-300x169.jpg 300w, https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-768x432.jpg 768w, https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-1536x864.jpg 1536w, https:\/\/astresetplanetes.fr\/site\/wp-content\/uploads\/2025\/05\/pexels-photo-20337611-20337611-2048x1152.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">Mars<\/h2>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Masse <\/strong>: Il faudrait 9 plan\u00e8tes Mars pour atteindre le poids de la Terre<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Diam\u00e8tre <\/strong>: contre la Terre, elle recouvrirait l&rsquo;Am\u00e9rique du Sud<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Longueur du jour<\/strong> : 37 minutes de plus que la Terre<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Dur\u00e9e d&rsquo;une ann\u00e9e <\/strong>: 687 jours terrestres <\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Temp\u00e9rature en surface <\/strong>: -60 degr\u00e9s en moyenne (de 0 \u00e0 -140)<\/p>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-957b08a5 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-8c88cc59\">\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-eb4a8147aa9f23d141a1e7d3ce8d62e3\">Un immense d\u00e9sert : <\/p>\n\n\n\n<p class=\"has-text-align-left has-medium-font-size\">Mars n&rsquo;est pas une grosse plan\u00e8te : elle est sept fois grande que la Terre. Sa surface est un immense d\u00e9sert qui contient beaucoup de crat\u00e8re. Il existe aussi plusieurs volcans \u00e9teints, ainsi qu&rsquo;un gigantesque canyon nomm\u00e9 Valles Marineris. Celui-ci, large de 120 km par endroits, surpasse largement le c\u00e9l\u00e8bre canyon du Colorado aux Etats-Unis.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-b859a213\">\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-ac72250a95aa082793bb6bfd4904f85e\">L&rsquo;eau a disparu : <\/p>\n\n\n\n<p class=\"has-medium-font-size\">La plan\u00e8te n&rsquo;a jamais eu d&rsquo;oc\u00e9an, car la quantit\u00e9 d&rsquo;eau n&rsquo;est pas suffisante pour remplir autre chose que de grands lacs. Cette eau est aujourd&rsquo;hui stock\u00e9e dans le sous-sol, gel\u00e9 en permanence. Mais il existe un grand nombre de vall\u00e9es s\u00e8ches.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-1bf27e6d\">\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-a3f35562c305f2487a93bf587014c61e\">Temp\u00eates globales :<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Sur Mars, le ciel n&rsquo;est pas bleu comme celui de la Terre, mais il est rose saumon. Cela est d\u00fb aux fines particules de sable en suspension dans l&rsquo;air, soulev\u00e9es par des vents qui soufflent parfois en temp\u00eate. Celles-ci sont particuli\u00e8rement tous les 15 ans : la plan\u00e8te est alors totalement masqu\u00e9e pendant plusieurs semaines&#8230;   Le climat de Mars est aussi rigoureux que celui de l&rsquo;Antarctique, et l&rsquo;air martien est irrespirable car il est compos\u00e9 de <strong>dioxyde de carbone<\/strong>. De toutes fa\u00e7ons, nous ne pourrions pas vivre sur Mars car il y a si peu d&rsquo;air que les liquides s&rsquo;\u00e9vaporent \u00e0 basse temp\u00e9rature. Cons\u00e9quence : notre sang se mettrait \u00e0 boullir\/                         <\/p>\n<\/div>\n<\/div><\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction : D\u00e8s l&rsquo;antiquit\u00e9, la vif couleur rouge de la plan\u00e8te a rendu curieux beaucoup de personnes. Les Anciens pensaient [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[8,25,22],"tags":[35,36],"class_list":["post-792","post","type-post","status-publish","format-standard","hentry","category-lunivers","category-soleil","category-vie","tag-mars","tag-vie-sur-mars"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"Benjamin H.","author_link":"https:\/\/astresetplanetes.fr\/site\/author\/benjamin\/"},"uagb_comment_info":0,"uagb_excerpt":"Introduction : D\u00e8s l&rsquo;antiquit\u00e9, la vif couleur rouge de la plan\u00e8te a rendu curieux beaucoup de personnes. Les Anciens pensaient [&hellip;]","_links":{"self":[{"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/posts\/792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/comments?post=792"}],"version-history":[{"count":1,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/posts\/792\/revisions"}],"predecessor-version":[{"id":794,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/posts\/792\/revisions\/794"}],"wp:attachment":[{"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/media?parent=792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/categories?post=792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astresetplanetes.fr\/site\/wp-json\/wp\/v2\/tags?post=792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}