{"id":9015,"date":"2018-04-12T06:50:30","date_gmt":"2018-04-12T06:50:30","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9015"},"modified":"2018-04-24T17:45:31","modified_gmt":"2018-04-24T17:45:31","slug":"change-4-mission-chinoise-vers-face-cachee-de-lune","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/04\/12\/change-4-mission-chinoise-vers-face-cachee-de-lune\/","title":{"rendered":"Chang&#8217;e 4, une mission pour \u00e9tudier la face cach\u00e9e de la Lune"},"content":{"rendered":"<p><strong>Pour la premi\u00e8re fois, une mission (Chang&#8217;e 4) pr\u00e9voit de faire rouler un rover (chinois) sur la face cach\u00e9e de la Lune d&#8217;ici la fin de l&#8217;ann\u00e9e.<\/strong><\/p>\n<p>Les ambitions lunaires de la Chine semblent sans limite. Cela fait plusieurs ann\u00e9es que\u00a0des sondes chinoises sont envoy\u00e9es en direction de notre satellite naturel. Leur nom : Chang&#8217;e, la d\u00e9esse de la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/03\/14\/vieux-croissant-de-lune-a-laube-14-mars\/\" target=\"_blank\" rel=\"noopener\">Lune<\/a> dans la mythologie chinoise.<\/p>\n<figure id=\"attachment_9016\" aria-describedby=\"caption-attachment-9016\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/cnsa.jpg\" rel=\"lightbox[9015]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9016\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/cnsa-450x262.jpg\" alt=\"\" width=\"450\" height=\"262\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/cnsa-450x262.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/cnsa-768x446.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/cnsa.jpg 900w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9016\" class=\"wp-caption-text\">C&#8217;est la doublure du rover Yutu (con\u00e7u pour la mission Chang&#8217;e 3) qui devrait rouler dans quelques mois sur la face cach\u00e9e de la Lune. \u00a9 CNSA<\/figcaption><\/figure>\n<p>En 2007 c&#8217;est Chang\u2019e 1 qui est partie en reconnaissance (pour cartographier en 3D la surface lunaire depuis une altitude de 200 km), suivie trois ans plus tard par Chang\u2019e 2. En d\u00e9cembre 2013, Chang\u2019e 3 a emmen\u00e9 le rover Yutu (Lapin de jade) dans le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/11\/28\/paysages-celestes-a-explorer-7-golfe-iris\/\" target=\"_blank\" rel=\"noopener\">Golfe des Iris<\/a>. Apr\u00e8s les Am\u00e9ricains et les Russes, la Chine devenait ainsi la troisi\u00e8me puissance \u00e0 d\u00e9poser avec succ\u00e8s un v\u00e9hicule sur la Lune.<!--more--><\/p>\n<p>Prudente,\u00a0l\u2019administration spatiale nationale chinoise (<a href=\"http:\/\/www.cnsa.gov.cn\/n6443408\/index.html\" target=\"_blank\" rel=\"noopener\">CNSA<\/a>) avait pr\u00e9vu une mission de remplacement (Chang&#8217;e 4) si Chang&#8217;e 3 \u00e9chouait.\u00a0 C&#8217;est Chang&#8217;e 4 qui devrait donc \u00eatre utilis\u00e9e pour se poser et rouler sur une face cach\u00e9e bien diff\u00e9rente de l&#8217;h\u00e9misph\u00e8re lunaire que nous pouvons admirer depuis la nuit des temps : pas de mers mais une multitude de crat\u00e8res d&#8217;impact.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/clem.jpg\" rel=\"lightbox[9015]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9017\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/clem-450x319.jpg\" alt=\"\" width=\"450\" height=\"319\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/clem-450x319.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/clem.jpg 670w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Pourquoi cette diff\u00e9rence ? Les plan\u00e9tologues pensent qu&#8217;en se refroidissant plus rapidement, la face cach\u00e9e de la Lune s&#8217;est retrouv\u00e9e avec une cro\u00fbte plus \u00e9paisse, emp\u00eachant le magma lunaire de s&#8217;\u00e9chapper.<\/p>\n<p>En attendant de faire rouler la doublure de Yutu, la Chine doit d&#8217;abord r\u00e9ussir la premi\u00e8re \u00e9tape de la mission Chang&#8217;e 4 qui consiste \u00e0 placer en orbite lunaire au mois de juin un satellite relais destin\u00e9 \u00e0 assurer les communications entre le rover (cach\u00e9 derri\u00e8re la Lune) et la Terre. Si tout se passe bien, l&#8217;envoi du rover aura lieu six mois plus tard, en attendant une mission de retour d&#8217;\u00e9chantillons du sol lunaire avec Chang&#8217;e 5 l&#8217;ann\u00e9e suivante.<\/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>Pour la premi\u00e8re fois, une mission (Chang&#8217;e 4) pr\u00e9voit de faire rouler un rover (chinois) sur la face cach\u00e9e de la Lune d&#8217;ici la fin de l&#8217;ann\u00e9e. Les ambitions lunaires de la Chine semblent sans limite. Cela fait plusieurs ann\u00e9es que\u00a0des sondes chinoises sont envoy\u00e9es en direction de notre satellite naturel. Leur nom : Chang&#8217;e, &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/04\/12\/change-4-mission-chinoise-vers-face-cachee-de-lune\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Chang&#8217;e 4, une mission pour \u00e9tudier la face cach\u00e9e de la Lune<\/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":9016,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[2484,1180,2485,82],"class_list":["post-9015","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-change-4","tag-chine","tag-cnsa","tag-lune"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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