{"id":3412,"date":"2006-04-13T17:25:12","date_gmt":"2006-04-13T15:25:12","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil1\/?p=3412"},"modified":"2015-04-10T17:28:14","modified_gmt":"2015-04-10T15:28:14","slug":"venus-express","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/venus-express\/","title":{"rendered":"Venus Express"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p align=\"justify\"><span style=\"font-size: small;\">Ce matin du lundi 10 avril 2006, \u00e0 9h17 (heure de Paris), l&rsquo;allumage du moteur principal pendant une dur\u00e9e de 50 minutes a permis de r\u00e9duire de 29 000 \u00e0 environ 25 000 km\/h la vitesse relative de la sonde par rapport \u00e0 V\u00e9nus, permettant ainsi sa capture par le champ de gravit\u00e9 de la plan\u00e8te. Les man\u0153uvres d\u2019insertion en orbite se sont parfaitement bien d\u00e9roul\u00e9es.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-family: Arial; font-size: small;\"><span style=\"font-family: Verdana;\">La sonde Venus Express s&rsquo;est mise sur orbite mardi autour de l&rsquo;\u00e9toile du Berger, marquant l&rsquo;arriv\u00e9e de l&rsquo;Europe autour de cette plan\u00e8te dont elle doit \u00e9tudier l&rsquo;atmosph\u00e8re pour tenter de comprendre entre autres des ph\u00e9nom\u00e8nes comme le r\u00e9chauffement climatique sur Terre.<\/span><\/span><\/p>\n<p align=\"justify\"><span class=\"text11px\"><span style=\"font-size: small;\">Gr\u00e2ce aux pr\u00e9c\u00e9dentes missions \u00e0 destination de V\u00e9nus et aux observations effectu\u00e9es directement depuis la Terre, nous savons d\u00e9j\u00e0 que notre plus proche voisine est envelopp\u00e9e d&rsquo;une atmosph\u00e8re dense o\u00f9 r\u00e8gnent des temp\u00e9ratures extr\u00eames et des pressions tr\u00e8s \u00e9lev\u00e9es. Ces conditions induisent un effet de serre tr\u00e8s puissant, auquel s&rsquo;ajoute un ph\u00e9nom\u00e8ne de \u00ab\u00a0super rotation\u00a0\u00bb encore inexpliqu\u00e9, l&rsquo;atmosph\u00e8re de V\u00e9nus effectuant un tour complet de la plan\u00e8te en seulement quatre jours.<\/span><\/span><\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p align=\"justify\"><span class=\"text11px\"><span style=\"font-size: small;\">Au cours des quatre prochaines semaines, la sonde effectuera une nouvelle s\u00e9rie de man\u0153uvres qui la feront passer de sa position actuelle sur une orbite fortement allong\u00e9e parcourue en 9 jours, \u00e0 l&rsquo;orbite op\u00e9rationnelle choisie pour sa mission scientifique : une orbite polaire qu&rsquo;elle d\u00e9crira en 24 heures, s&rsquo;\u00e9loignant au maximum \u00e0 66 000 km de V\u00e9nus. Une fois install\u00e9e \u00e0 ce poste d&rsquo;observation, elle conduira une \u00e9tude d\u00e9taill\u00e9e de la structure, de la chimie et de la dynamique de l&rsquo;atmosph\u00e8re de V\u00e9nus. La dur\u00e9e de la mission sera d&rsquo;au moins deux jours v\u00e9nusiens, soit l&rsquo;\u00e9quivalent de 486 jours terrestres.<\/span><span class=\"text11px\"><span style=\"font-size: small;\">\u00a0\u00a0<br clear=\"all\" \/><\/span><\/span><\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">L&rsquo;objectif de la mission Venus Express consistera \u00e0 \u00e9tudier en d\u00e9tail les caract\u00e9ristiques de cette atmosph\u00e8re \u00e0 l&rsquo;aide de capteurs perfectionn\u00e9s afin de tenter de r\u00e9soudre les questions que les pr\u00e9c\u00e9dentes missions ont laiss\u00e9es en suspens. Ce sera \u00e9galement le premier orbiteur de V\u00e9nus \u00e0 effectuer des observations de la surface de la plan\u00e8te \u00e0 travers les \u00ab\u00a0fen\u00eatres de visibilit\u00e9\u00a0\u00bb d\u00e9couvertes dans les bandes infrarouges.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">La mise en service des instruments scientifiques embarqu\u00e9s d\u00e9butera bient\u00f4t et les premi\u00e8res donn\u00e9es brutes sont attendues d&rsquo;ici quelques jours. L&rsquo;ensemble de la charge utile scientifique devrait \u00eatre pleinement op\u00e9rationnelle dans deux mois.<br \/>\n<\/span><\/p>\n<p align=\"center\"><span style=\"font-size: small;\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/50_VENUS8_L.jpeg\" alt=\"\" \/><\/span><\/p>\n<p align=\"center\"><span style=\"font-size: small;\">source : <a href=\"http:\/\/www.esa.int\/\">http:\/\/www.esa.int<\/a><\/span><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"3412\">(261)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Ce matin du lundi 10 avril 2006, \u00e0 9h17 (heure de Paris), l&rsquo;allumage du moteur principal pendant une dur\u00e9e de&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3413,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22],"tags":[252,117,2885,185,2509,702,567,1629],"class_list":["post-3412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-atmosphere","tag-espace","tag-expres","tag-observations","tag-rotation","tag-sonde","tag-super","tag-venus","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/venus-express-sonde.jpeg?fit=200%2C160&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-T2","jetpack-related-posts":[{"id":9907,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-sonde-japonaise-akatsuki-en-orbite-autour-de-venus\/","url_meta":{"origin":3412,"position":0},"title":"La sonde Japonaise Akatsuki en orbite autour de V\u00e9nus","author":"Admin","date":"10 d\u00e9cembre 2015","format":false,"excerpt":"Si les missions spatiales se d\u00e9roulent g\u00e9n\u00e9ralement relativement bien, il arrive que des incidents viennent enrayer la m\u00e9canique bien huil\u00e9e des sondes. L'agence spatiale japonaise en a fait les frais avec sa sonde Akatsuki qui vient seulement d'arriver \u00e0 destination... avec cinq ans de retard. Il n'y a pas que\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/venus.jpg?fit=1024%2C768&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/venus.jpg?fit=1024%2C768&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/venus.jpg?fit=1024%2C768&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/venus.jpg?fit=1024%2C768&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":8522,"url":"https:\/\/www.laterredufutur.com\/accueil\/apres-mars-et-pluton-en-route-pour-venus\/","url_meta":{"origin":3412,"position":1},"title":"Apr\u00e8s Mars et Pluton, en route pour V\u00e9nus","author":"Admin","date":"3 octobre 2015","format":false,"excerpt":"La voisine de la Terre est l\u2019objectif de deux des cinq missions pressenties pour \u00eatre lanc\u00e9es par l\u2019agence spatiale am\u00e9ricaine la NASA. Objectif V\u00e9nus. La Nasa a d\u00e9voil\u00e9 mercredi soir la liste des cinq projets d\u2019exploration spatiale pressentis pour \u00eatre financ\u00e9s et concr\u00e9tis\u00e9s, dont deux concernent notre voisine. Chacun va\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":2726,"url":"https:\/\/www.laterredufutur.com\/accueil\/venus-devoilee\/","url_meta":{"origin":3412,"position":2},"title":"V\u00e9nus d\u00e9voil\u00e9e","author":"Admin","date":"4 mars 2005","format":false,"excerpt":"Voici V\u00e9nus dans toute sa plendeur que vous pourrez\u00a0t\u00e9l\u00e9charger ci apr\u00e8s. L'atmosph\u00e8re de V\u00e9nus chauffe \u00e0 plus de 480\u00b0 et poss\u00e8de une superbe couche d'acide sulfurique. La vie est impossible et personne ne l'a jamais observ\u00e9e r\u00e9ellement. \u00a0 La plan\u00e8te V\u00e9nus, le joyau du ciel, \u00e9tait connue des anciens astronomes\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":11952,"url":"https:\/\/www.laterredufutur.com\/accueil\/lesa-decouvre-une-surprise-glaciale-cachee-aux-poles-de-venus\/","url_meta":{"origin":3412,"position":3},"title":"L&rsquo;ESA d\u00e9couvre une surprise glaciale cach\u00e9e aux p\u00f4les de V\u00e9nus","author":"Admin","date":"25 avril 2016","format":false,"excerpt":"- 157 \u00b0C aux p\u00f4les de V\u00e9nus : la surprise posthume de Venus Express ! Quelques mois avant de plonger, la sonde Venus Express, qui exp\u00e9rimentait l\u2019a\u00e9rofreinage, a recueilli des informations in\u00e9dites sur l\u2019atmosph\u00e8re des r\u00e9gions polaires. Surprise, il y fait plus froid que pr\u00e9vu, elle est moins dense et\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/Venus_Express_aerobraking.jpg?fit=1024%2C576&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/Venus_Express_aerobraking.jpg?fit=1024%2C576&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/Venus_Express_aerobraking.jpg?fit=1024%2C576&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/Venus_Express_aerobraking.jpg?fit=1024%2C576&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":14573,"url":"https:\/\/www.laterredufutur.com\/accueil\/venus-abriterait-elle-la-vie\/","url_meta":{"origin":3412,"position":4},"title":"V\u00e9nus abriterait-elle la vie ?","author":"Admin","date":"13 f\u00e9vrier 2017","format":false,"excerpt":"Venus est consid\u00e9r\u00e9e depuis toujours comme une des plan\u00e8tes les plus inhospitali\u00e8res par les astronomes. En raison de sa proximit\u00e9 avec l\u2019\u00e9toile de notre syst\u00e8me, la pression \u00e0 la surface est estim\u00e9e \u00e0 90 atmosph\u00e8res et la temp\u00e9rature \u00e0 sa surface atteint les 450 \u00b0C. Des conditions extr\u00eames, et peu\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":21607,"url":"https:\/\/www.laterredufutur.com\/accueil\/de-la-planete-venus-primitive-habitable-a-sa-terraformation\/","url_meta":{"origin":3412,"position":5},"title":"De la plan\u00e8te V\u00e9nus primitive habitable \u00e0 sa terraformation","author":"Admin","date":"24 novembre 2020","format":false,"excerpt":"La Terre et V\u00e9nus sont des plan\u00e8tes \u00ab s\u0153urs \u00bb et pourtant, elles ont \u00e9volu\u00e9 tr\u00e8s diff\u00e9remment, l'une des deux \u00e9tant devenue un enfer volcanique et d\u00e9pourvue d'oc\u00e9ans. La Nasa envisage une nouvelle mission \u00e0 destination de V\u00e9nus pour tenter de mieux comprendre l'origine de ces diff\u00e9rences et si des\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/venus-habitable.jpg?fit=1176%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/venus-habitable.jpg?fit=1176%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/venus-habitable.jpg?fit=1176%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/venus-habitable.jpg?fit=1176%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/venus-habitable.jpg?fit=1176%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3412","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=3412"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3412\/revisions"}],"predecessor-version":[{"id":3414,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3412\/revisions\/3414"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/3413"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=3412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=3412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=3412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}