{"id":10055,"date":"2021-02-20T08:03:25","date_gmt":"2021-02-20T07:03:25","guid":{"rendered":"http:\/\/rutube.fr\/?p=10055"},"modified":"2021-02-20T08:03:25","modified_gmt":"2021-02-20T07:03:25","slug":"a-la-conquete-de-la-planete-rouge","status":"publish","type":"post","link":"https:\/\/webtube.fr\/index.php\/2021\/02\/20\/a-la-conquete-de-la-planete-rouge\/","title":{"rendered":"A la conqu\u00eate de la plan\u00e8te rouge"},"content":{"rendered":"\n<p>ticles \u00a0:\u00a0<a href=\"http:\/\/rutube.fr\/2021\/02\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fev. 2021<\/a>\u00a0\u2013\u00a0<a href=\"http:\/\/rutube.fr\/2021\/01\/\" target=\"_blank\" rel=\"noreferrer noopener\">Jan. 2021<\/a>\u00a0\u2013\u00a0<a href=\"http:\/\/rutube.fr\/2020\/12\/\" target=\"_blank\" rel=\"noreferrer noopener\">Dec. 2020<\/a>\u00a0\u2013\u00a0<a href=\"http:\/\/rutube.fr\/2020\/11\/\" target=\"_blank\" rel=\"noreferrer noopener\">Nov. 2020<\/a><\/p>\n\n\n\n<figure><iframe loading=\"lazy\" width=\"800\" height=\"200\" src=\"http:\/\/www.weboomedia.fr\/RutubeStreaming1.htm\" frameborder=\"N\" scrolling=\"no\"><\/iframe><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/ghwCqiQwrFQ\/maxresdefault.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>Le robot&nbsp;<strong>\u201cPers\u00e9v\u00e9rance\u201d<\/strong>&nbsp;s\u2019est pos\u00e9 hier soir sans dommage sur Mars. Un exploit absolu pour la NASA. Des cris de joie et de victoire apr\u00e8s 7 minutes de \u201cterreur\u201d.<\/p>\n\n\n\n<p>Car cette arriv\u00e9e sur le sol martien \u00e9tait la phase de tous les dangers, ne tol\u00e9rant aucune marge d\u2019erreur.<\/p>\n\n\n\n<p>Enti\u00e8rement automatis\u00e9e et se d\u00e9roulant \u00e0\u00a0<strong>200 millions de kilom\u00e8tres de la Terre<\/strong>, soit 11 minutes \u00e0 la vitesse de la lumi\u00e8re, cette entr\u00e9e dans l\u2019atmosph\u00e8re de la plan\u00e8te Mars a \u00e9t\u00e9 conforme en tous points aux calculs des g\u00e9nies scientifiques lanc\u00e9s \u00e0 la conqu\u00eate de l\u2019Espace.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/c1.lestechnophiles.com\/www.numerama.com\/wp-content\/uploads\/2021\/02\/perseverance-rover-nasa.jpg?resize=1212,712\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>Nom de la mission : \u201cMars 2020\u201d<\/strong><\/p>\n\n\n\n<p>Op\u00e9rateurs : la NASA et l\u2019Agence spatiale europ\u00e9enne (ESA)<\/p>\n\n\n\n<p>But de la mission : rapporter des \u00e9chantillons du sol martien, afin de trouver des traces de vie sur la plan\u00e8te rouge remontant \u00e0 3 milliards d\u2019ann\u00e9es.<\/p>\n\n\n\n<p>Dur\u00e9e du vol : parti de cap Canaveral le 30 juillet 2020, arriv\u00e9 le 18 f\u00e9vrier 2021 \u00e0 21h55&nbsp; heure fran\u00e7aise.<\/p>\n\n\n\n<p>Dur\u00e9e de la mission \u201cMars 2020\u201d : premier retour sur Terre des \u00e9chantillons de roches martiennes en 2031<\/p>\n\n\n\n<p>Budget : 2,5 milliards de dollars<\/p>\n\n\n\n<p>A noter que c\u2019est un&nbsp;<strong>astrophysicien fran\u00e7ais, Sylvestre Maurice<\/strong>, qui a con\u00e7u la cam\u00e9ra laser de&nbsp;<strong>\u201cPers\u00e9v\u00e9rance\u201d.<\/strong><\/p>\n\n\n\n<p>\u201cR\u00e9compens\u00e9 par l\u2019Acad\u00e9mie des sciences en 2020, Sylvestre Maurice est le responsable de la cam\u00e9ra laser SuperCam, en route pour la plan\u00e8te Mars. Il avait d\u00e9j\u00e0 con\u00e7u ChemCam pour le rover Curiosity.\u201d<\/p>\n\n\n\n<p><strong>D\u00e9roulement de \u201cl\u2019atterrissage\u201d sur Mars. Les 7 minutes de tous les dangers.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.futura-sciences.com\/buildsv6\/images\/mediumoriginal\/8\/f\/d\/8fd4d0ccf8_50173155_sept-minutes-terreur-perseverance.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>La NASA&nbsp; a fourni une excellent infographie pr\u00e9cisant le d\u00e9roul\u00e9 de cette phase cruciale, pouvant se solder par un d\u00e9sastre au moindre accroc.<\/p>\n\n\n\n<p><strong>E = heure z\u00e9ro<\/strong>&nbsp;de l\u2019entr\u00e9e dans l\u2019atmosph\u00e8re de Mars ( 21h55 heure fran\u00e7aise )<\/p>\n\n\n\n<p><strong>En 7 minutes \u201cPers\u00e9v\u00e9rance\u201d doit passer d\u2019une vitesse de 23 000 km\/h \u00e0 2,7 km\/h.&nbsp;<\/strong><\/p>\n\n\n\n<p>E \u2013 10 minutes, la sonde se d\u00e9tache de l\u2019\u00e9tage de croisi\u00e8re<\/p>\n\n\n\n<p>E = la sonde entre dans l\u2019atmosph\u00e8re martienne<\/p>\n\n\n\n<p>E + 1m.20s = temp\u00e9rature maximale du bouclier thermique<\/p>\n\n\n\n<p>E + 1m.30s = d\u00e9c\u00e9l\u00e9ration maximale<\/p>\n\n\n\n<p>E + 4min = 1512 km\/h et d\u00e9ploiement du parachute<\/p>\n\n\n\n<p>E + 4m.20s =&nbsp; 576 km\/h et largage du bouclier thermique avant<\/p>\n\n\n\n<p>E + 4m.50s = 378 km\/h et identification de la position par radar<\/p>\n\n\n\n<p>E + 5m.30s = identification de la position par syst\u00e8me optique<\/p>\n\n\n\n<p>E + 5m.50s = 320 km\/h et largage du bouclier arri\u00e8re<\/p>\n\n\n\n<p>E + 6m.30 = s\u00e9paration du robot \u201cPers\u00e9v\u00e9rence\u201d du module de descente<\/p>\n\n\n\n<p>E + 6m.50 = atterrissage, vitesse 2,7 km\/h<\/p>\n\n\n\n<p><strong>La collecte d\u2019\u00e9chantillons va durer plusieurs ann\u00e9es.<\/strong><\/p>\n\n\n\n<p>D\u2019autres missions, en 2026 et 2028, sont programm\u00e9es pour le retour des \u00e9chantillons sur Terre.<\/p>\n\n\n\n<p>Une mini-fus\u00e9e les r\u00e9coltera et red\u00e9collera pour se mettre en orbite autour de Mars. L\u00e0 encore un d\u00e9fi&nbsp; titanesque \u00e0 relever.<\/p>\n\n\n\n<p>Une fus\u00e9e&nbsp;<strong>Ariane 6<\/strong>&nbsp;emportera un vaisseau fabriqu\u00e9 par Airbus, qui se mettra en orbite autour de Mars, pour assurer le retour sur Terre.<\/p>\n\n\n\n<p>Ce vaisseau r\u00e9cup\u00e9rera la mini-fus\u00e9e en attente orbitale.<\/p>\n\n\n\n<p><strong>Le retour vers la Terre durera 1 an.<\/strong>&nbsp;Une capsule contenant les pr\u00e9cieux \u00e9chantillons sera alors largu\u00e9e dans&nbsp; l\u2019atmosph\u00e8re terrestre.<\/p>\n\n\n\n<p>Si tout se passe bien, la g\u00e9ochimie prendra la rel\u00e8ve pour les analyser et nous livrer les secrets de la&nbsp;<strong>plan\u00e8te rouge<\/strong>&nbsp;et son histoire.<\/p>\n\n\n\n<p>La conqu\u00eate spatiale ne fait que commencer.<\/p>\n\n\n\n<p>( source Figaro )<\/p>\n\n\n\n<p><strong>Jacques Guillemain<\/strong>, Riposte La\u00efque<\/p>\n\n\n\n<!-- ADDFREESTATS.COM AUTOCODE V4.0 -->\n<script type=\"text\/javascript\">\n<!--\nvar AFS_Account=\"00636949\";\nvar AFS_Tracker=\"auto\";\nvar AFS_Server=\"www6\";\nvar AFS_Page=\"DetectName\";\nvar AFS_Url=\"DetectUrl\";\n\/\/ -->\n<\/script>\n<script type=\"text\/javascript\" src=\"http:\/\/www6.addfreestats.com\/cgi-bin\/afstrack.cgi?usr=00636949\">\n<\/script>\n<noscript>\n<a href=\"http:\/\/www.addfreestats.com\">\n<img decoding=\"async\" src=\"http:\/\/www6.addfreestats.com\/cgi-bin\/connect.cgi?usr=00636949Pauto\" border=\"0\" alt=\"AddFreeStats.com Free Web Stats!\">Web Stats<\/a>\n<\/noscript>\n\n<!-- ENDADDFREESTATS.COM AUTOCODE V4.0  \u2192\n","protected":false},"excerpt":{"rendered":"<p>ticles \u00a0:\u00a0Fev. 2021\u00a0\u2013\u00a0Jan. 2021\u00a0\u2013\u00a0Dec. 2020\u00a0\u2013\u00a0Nov. 2020 Le robot&nbsp;\u201cPers\u00e9v\u00e9rance\u201d&nbsp;s\u2019est pos\u00e9 hier soir sans dommage sur Mars. Un exploit absolu pour la NASA. Des cris de joie et de victoire apr\u00e8s 7 minutes de \u201cterreur\u201d. Car cette arriv\u00e9e sur le sol martien \u00e9tait la phase de tous les dangers, ne tol\u00e9rant aucune marge d\u2019erreur. Enti\u00e8rement automatis\u00e9e et &hellip; <a href=\"https:\/\/webtube.fr\/index.php\/2021\/02\/20\/a-la-conquete-de-la-planete-rouge\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;A la conqu\u00eate de la plan\u00e8te rouge&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-10055","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A la conqu\u00eate de la plan\u00e8te rouge - # WEBTUBE.fr<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/webtube.fr\/index.php\/2021\/02\/20\/a-la-conquete-de-la-planete-rouge\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A la conqu\u00eate de la plan\u00e8te rouge - # WEBTUBE.fr\" \/>\n<meta property=\"og:description\" content=\"ticles \u00a0:\u00a0Fev. 2021\u00a0\u2013\u00a0Jan. 2021\u00a0\u2013\u00a0Dec. 2020\u00a0\u2013\u00a0Nov. 2020 Le robot&nbsp;\u201cPers\u00e9v\u00e9rance\u201d&nbsp;s\u2019est pos\u00e9 hier soir sans dommage sur Mars. Un exploit absolu pour la NASA. Des cris de joie et de victoire apr\u00e8s 7 minutes de \u201cterreur\u201d. Car cette arriv\u00e9e sur le sol martien \u00e9tait la phase de tous les dangers, ne tol\u00e9rant aucune marge d\u2019erreur. 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