{"id":10897,"date":"2023-04-19T20:06:21","date_gmt":"2023-04-19T20:06:21","guid":{"rendered":"https:\/\/startup-agenda.com\/?p=10897"},"modified":"2023-04-19T20:06:27","modified_gmt":"2023-04-19T20:06:27","slug":"juice-lancement-reussi-pour-une-mission-ambitieuse-vers-jupiter","status":"publish","type":"post","link":"https:\/\/startup-agenda.com\/annuaire\/2023\/04\/19\/juice-lancement-reussi-pour-une-mission-ambitieuse-vers-jupiter\/","title":{"rendered":"JUICE : Lancement r\u00e9ussi pour une mission ambitieuse vers Jupiter"},"content":{"rendered":"\n

Le satellite JUICE <\/a>(Jupiter Icy Moon Explorer) a \u00e9t\u00e9 lanc\u00e9 depuis Kourou, en Guyane fran\u00e7aise, \u00e0 14h14, heure belge, le vendredi. Cette mission ambitieuse a pour objectif l’\u00e9tude de la plan\u00e8te Jupiter et de certaines de ses lunes.<\/p>\n\n\n\n

Apr\u00e8s un jour de report d\u00fb aux conditions m\u00e9t\u00e9orologiques, le lancement a finalement \u00e9t\u00e9 r\u00e9ussi. Les boosters ont \u00e9t\u00e9 d\u00e9connect\u00e9s quelques minutes apr\u00e8s le d\u00e9collage, suivi de l’\u00e9jection du c\u00f4ne de nez \u00e0 14h18. Cette \u00e9tape permet de prot\u00e9ger la charge utile lors de l’ascension et de l’\u00e9jecter ensuite dans l’espace. C’est \u00e0 ce moment-l\u00e0 que JUICE a \u00e9t\u00e9 expos\u00e9 \u00e0 l’espace pour la premi\u00e8re fois.<\/p>\n\n\n\n

\"JUICE\"<\/figure>\n\n\n\n

La fus\u00e9e a acc\u00e9l\u00e9r\u00e9 de 3,5 \u00e0 7 kilom\u00e8tres par seconde entre 14h20 et 14h24, avant que l’\u00e9tage principal ne soit largu\u00e9. Apr\u00e8s cela, JUICE a continu\u00e9 \u00e0 voler autour de la Terre pendant un certain temps, augmentant progressivement sa vitesse jusqu’\u00e0 atteindre les 10 kilom\u00e8tres par seconde. L’altitude de la plateforme est \u00e9galement pass\u00e9e d’environ 200 kilom\u00e8tres \u00e0 plus de 1 500 kilom\u00e8tres.<\/p>\n\n\n\n

\u00c0 14h42, heure belge, le dernier \u00e9tage de la fus\u00e9e, le plus petit, a \u00e9t\u00e9 largu\u00e9, marquant le d\u00e9but de la mission de JUICE vers Jupiter.<\/p>\n\n\n\n

Apr\u00e8s son lancement, JUICE commencera un voyage de huit ans vers Jupiter, o\u00f9 il passera plusieurs fois devant les principales lunes glac\u00e9es de la plan\u00e8te, notamment Ganym\u00e8de, Callisto et Europe. Les objectifs de cette mission sont multiples, allant de l’examen de la g\u00e9ologie et de la composition des lunes \u00e0 l’\u00e9tude des oc\u00e9ans et de l’\u00e9paisseur de la couche de glace sur celles-ci.<\/p>\n\n\n\n

JUICE est la premi\u00e8re mission majeure de l’Agence spatiale europ\u00e9enne dans le cadre de son programme Cosmic Vision. Elle fait partie des missions de classe L (large), qui sont des missions ambitieuses et co\u00fbteuses. JUICE sera \u00e9quip\u00e9 d’un large \u00e9ventail d’instruments scientifiques pour r\u00e9aliser des mesures et des analyses des lunes de Jupiter.<\/p>\n\n\n\n

La mission JUICE se d\u00e9roulera en trois phases principales :<\/p>\n\n\n\n

Phase 1 : La phase de croisi\u00e8re interplan\u00e9taire, qui durera 3 ans. Phase 2 : La phase d’exploration, o\u00f9 le satellite entrera en orbite autour de Jupiter pendant 3 ans pour effectuer des observations d\u00e9taill\u00e9es. Phase 3 : La phase d’extension de mission, o\u00f9 JUICE poursuivra ses observations en se concentrant sur certaines lunes en particulier.<\/p>\n\n\n\n

De plus, cette mission examinera \u00e9galement le fonctionnement du syst\u00e8me de Jupiter. L’Agence spatiale europ\u00e9enne est principalement int\u00e9ress\u00e9e par l’origine de ce syst\u00e8me. Les astronomes veulent \u00e9galement savoir si des plan\u00e8tes similaires \u00e0 Jupiter existent dans d’autres syst\u00e8mes solaires.<\/p>\n\n\n\n

Jupiter a probablement captur\u00e9 une grande quantit\u00e9 de gaz et de poussi\u00e8re dans sa r\u00e9gion orbitale, cr\u00e9ant ainsi un disque protoplan\u00e9taire qui s’est rapidement d\u00e9velopp\u00e9. Ce disque est devenu le site de la formation de nombreux corps c\u00e9lestes, y compris les plan\u00e8tes g\u00e9antes gazeuses comme Saturne, Uranus et Neptune. En outre, le champ gravitationnel de Jupiter a perturb\u00e9 les orbites des plan\u00e8tes en formation, les faisant migrer vers des emplacements diff\u00e9rents de ceux o\u00f9 elles ont \u00e9t\u00e9 cr\u00e9\u00e9es.<\/p>\n\n\n\n

Cette migration plan\u00e9taire a \u00e9galement eu un impact sur les plan\u00e8tes rocheuses plus proches du Soleil, comme la Terre. Les interactions gravitationnelles ont provoqu\u00e9 des collisions entre les corps en formation, qui ont finalement conduit \u00e0 la formation de notre plan\u00e8te telle que nous la connaissons aujourd’hui. Jupiter a donc eu un r\u00f4le crucial dans la formation de notre syst\u00e8me solaire en influen\u00e7ant la trajectoire et la composition des corps c\u00e9lestes qui le composent.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le satellite JUICE (Jupiter Icy Moon Explorer) a \u00e9t\u00e9 lanc\u00e9 depuis Kourou, en Guyane fran\u00e7aise, \u00e0 14h14, heure belge, le vendredi. Cette mission ambitieuse a pour objectif l’\u00e9tude de la […]<\/p>\n","protected":false},"author":1,"featured_media":10899,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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-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-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-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-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-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-gradient":""}},"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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[9],"tags":[346],"class_list":["post-10897","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actus","tag-juice"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/startup-agenda.com\/annuaire\/wp-content\/uploads\/2023\/04\/JUICE-1.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/posts\/10897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/comments?post=10897"}],"version-history":[{"count":1,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/posts\/10897\/revisions"}],"predecessor-version":[{"id":10900,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/posts\/10897\/revisions\/10900"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/media\/10899"}],"wp:attachment":[{"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/media?parent=10897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/categories?post=10897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/startup-agenda.com\/annuaire\/wp-json\/wp\/v2\/tags?post=10897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}