{"id":22951,"date":"2026-07-27T17:04:36","date_gmt":"2026-07-27T17:04:36","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22951"},"modified":"2026-07-27T17:08:32","modified_gmt":"2026-07-27T17:08:32","slug":"sur-la-lune-les-mysteres-du-fascinant-plateau-daristarque","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/07\/27\/sur-la-lune-les-mysteres-du-fascinant-plateau-daristarque\/","title":{"rendered":"Sur la Lune, les myst\u00e8res du fascinant plateau d&#8217;Aristarque"},"content":{"rendered":"<p><strong>C&#8217;est l&#8217;une des r\u00e9gions lunaires les plus \u00e9tonnantes : visite guid\u00e9e du plateau d&#8217;Aristarque, d\u00e9j\u00e0 observable dans un petit t\u00e9lescope.<\/strong><\/p>\n<h5>Un crat\u00e8re \u00e0 la jeunesse toute relative :<\/h5>\n<p>Pour explorer le c\u00e9l\u00e8bre plateau d&#8217;Aristarque, je vous invite \u00e0 regarder l&#8217;h\u00e9misph\u00e8re Nord-Ouest de la <a href=\"https:\/\/cnes.fr\/dossiers\/lune\" target=\"_blank\" rel=\"noopener\">Lune<\/a>. C&#8217;est l\u00e0, au milieu de l\u2019oc\u00e9an des Temp\u00eates (<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Oc%C3%A9an_des_Temp%C3%AAtes\" target=\"_blank\" rel=\"noopener\"><em>Oceanus Procellarum<\/em><\/a>), que nous attend Aristarque. Il fait partie des plus jeunes grands crat\u00e8res lunaires (450 millions d&#8217;ann\u00e9es quand m\u00eame !) :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/aristarque2.jpg\" rel=\"lightbox[22951]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22953\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/aristarque2-444x450.jpg\" alt=\"\" width=\"444\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/aristarque2-444x450.jpg 444w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/aristarque2.jpg 691w\" sizes=\"auto, (max-width: 444px) 100vw, 444px\" \/><\/a><\/p>\n<p>Observ\u00e9 pour la premi\u00e8re fois en 1645 par <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Johannes_Hevelius\" target=\"_blank\" rel=\"noopener\">Johannes Hevelius<\/a>, il a \u00e9t\u00e9 nomm\u00e9 en l&#8217;honneur de <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Aristarque_de_Samos\" target=\"_blank\" rel=\"noopener\">Aristarque de Samos<\/a>. Ce crat\u00e8re s&#8217;est form\u00e9 suite \u00e0 la chute d&#8217;une <a href=\"https:\/\/cnes.fr\/dossiers\/cometes\" target=\"_blank\" rel=\"noopener\">com\u00e8te<\/a> ou un d&#8217;un <a href=\"https:\/\/cnes.fr\/dossiers\/asteroides\" target=\"_blank\" rel=\"noopener\">ast\u00e9ro\u00efde<\/a>. L\u2019impact a creus\u00e9 une excavation de 40 kilom\u00e8tres de diam\u00e8tre, profonde de 3.500 m\u00e8tres.<!--more--><\/p>\n<h5>Plateau brun et t\u00eate de cobra :<\/h5>\n<p>Pour explorer cette r\u00e9gion, nous allons utiliser un <a href=\"https:\/\/www.facebook.com\/photo?fbid=10165866764600934&amp;set=a.483374755933\" target=\"_blank\" rel=\"noopener\">superbe clich\u00e9<\/a> de l&#8217;astrophotographe <a href=\"https:\/\/www.damianpeach.com\/\" target=\"_blank\" rel=\"noopener\">Damian Peach<\/a>. On y d\u00e9couvre alors un plateau avec une \u00e9trange coloration brune, caus\u00e9e par des d\u00e9p\u00f4ts de <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pyroclastite\" target=\"_blank\" rel=\"noopener\">roches pyroclastiques<\/a>. Si Aristarque est si brillant, c&#8217;est en raison de sa relative jeunesse : le <a href=\"https:\/\/www.aeronomie.be\/fr\/encyclopedie\/vent-solaire-flux-particules-chargees-sechappant-soleil\" target=\"_blank\" rel=\"noopener\">vent solaire<\/a> n&#8217;a pas encore alt\u00e9r\u00e9 les \u00e9jectas autour du crat\u00e8re. Curieusement, ils ne sont d&#8217;ailleurs pas identiques partout, sans que l\u2019on sache pourquoi. On observe par exemple des basaltes et de la cendre au Nord-Est, alors que des roches granitiques pr\u00e9dominent au Sud-Ouest :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach.jpg\" rel=\"lightbox[22951]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23014\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/07\/peach.jpg 1502w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Mais Aristarque n&#8217;est pas la seule vedette du plateau. Une autre formation attire l&#8217;\u0153il :\u00a0 la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Vallis_Schr%C3%B6teri\" target=\"_blank\" rel=\"noopener\">vall\u00e9e de Schr\u00f6ter<\/a>. Il s\u2019agit d\u2019une faille longue de 160 km pour une profondeur moyenne de 1.000 m\u00e8tres. D&#8217;une largeur variant de de 6 \u00e0 10 km, elle a probablement \u00e9t\u00e9 creus\u00e9e par des torrents de lave. Cette vall\u00e9e \u00e9voque la forme d\u2019un cobra dont la t\u00eate serait form\u00e9e par le crat\u00e8re H\u00e9rodote. Si vous en avez l&#8217;occasion, observez cette r\u00e9gion lunaire dans un t\u00e9lescope, vous la trouverez fascinante !<\/p>\n<figure id=\"attachment_14349\" aria-describedby=\"caption-attachment-14349\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune.jpg\" rel=\"lightbox[22951]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14349\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/06\/lune.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-14349\" class=\"wp-caption-text\">Il n\u2019y a pas d\u2019\u00e2ge pour admirer la Lune et ses crat\u00e8res ! \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/26\/fabrice-morin-le-photographe-qui-apprivoise-la-lune\/\" target=\"_blank\" rel=\"noopener\">Fabrice Morin, le photographe qui apprivoise la Lune<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/04\/17\/en-couleurs-la-lune-nous-raconte-son-histoire-geologique\/\" target=\"_blank\" rel=\"noopener\">En couleurs, la Lune r\u00e9v\u00e8le son histoire g\u00e9ologique<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/11\/en-video-la-lune-insolite-de-darya-kawa-mirza\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : la Lune insolite de Darya Kawa Mirza<\/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>C&#8217;est l&#8217;une des r\u00e9gions lunaires les plus \u00e9tonnantes : visite guid\u00e9e du plateau d&#8217;Aristarque, d\u00e9j\u00e0 observable dans un petit t\u00e9lescope. Un crat\u00e8re \u00e0 la jeunesse toute relative : Pour explorer le c\u00e9l\u00e8bre plateau d&#8217;Aristarque, je vous invite \u00e0 regarder l&#8217;h\u00e9misph\u00e8re Nord-Ouest de la Lune. C&#8217;est l\u00e0, au milieu de l\u2019oc\u00e9an des Temp\u00eates (Oceanus Procellarum), que &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/07\/27\/sur-la-lune-les-mysteres-du-fascinant-plateau-daristarque\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Sur la Lune, les myst\u00e8res du fascinant plateau d&#8217;Aristarque<\/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":22952,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[1033,692,82,477,2632,1035],"class_list":["post-22951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-aristarque","tag-damian-peach","tag-lune","tag-ocean-des-tempetes","tag-on-the-moon","tag-vallee-de-schroter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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