{"id":965,"date":"2004-12-09T15:03:00","date_gmt":"2004-12-09T14:03:00","guid":{"rendered":"https:\/\/kids.esa.int\/titan_here_we_come\/"},"modified":"2026-10-08T00:34:17","modified_gmt":"2026-10-07T22:34:17","slug":"titan_here_we_come","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/titan_here_we_come\/","title":{"rendered":"Titan nous voil\u00e0 !"},"content":{"rendered":"
\n

L'un des chapitres les plus passionnants de l'histoire de l'exploration spatiale est sur le point de s'ouvrir. Apr\u00e8s un voyage de plus de sept ans et 3 milliards de kilom\u00e8tres parcourus, la sonde Huygens de l'ESA va bient\u00f4t se poser sur Titan, la plus grosse lune de Saturne.<\/p>\n<\/div>\n

La sonde europ\u00e9enne Huygens sera largu\u00e9e par l'orbiteur Cassini le jour de No\u00ebl. En tournant sur elle-m\u00eame \u00e0 la vitesse de 7 tours par minute, la petite sonde en forme de soucoupe avancera comme une fl\u00e8che vers la lune envelopp\u00e9e sous une \u00e9paisse couche de brume.<\/p>\n

Apr\u00e8s 20 jours de sommeil, le r\u00e9veil \u00e0 bord de la sonde se mettra \u00e0 sonner. Le 14 janvier, la sonde entrera dans la haute atmosph\u00e8re de Titan \u00e0 une vitesse d'environ 6 km par seconde - 10 fois plus vite que le Concorde.<\/p>\n

\"Huygens
Huygens p\u00e9n\u00e8tre dans l'atmosph\u00e8re de Titan<\/figcaption><\/figure>\n

Son bouclier thermique, soumis \u00e0 une temp\u00e9rature d'environ 8 000\u00b0C, prendra une coloration rouge-orang\u00e9e tr\u00e8s brillante. La partie la plus mauvaise de la descente durera moins de deux minutes.<\/p>\n

Ensuite, la vitesse de la sonde tombera \u00e0 1 400 km\/h et le bouclier, noirci par la chaleur, se d\u00e9tachera en permettant l'ouverture des parachutes. Les cam\u00e9ras et autres instruments embarqu\u00e9s sur Huygens mesureront la composition de l'atmosph\u00e8re et prendront des photos du paysage \u00e9tranger au-dessous.<\/p>\n

Deux heures plus tard, l'explorateur intr\u00e9pide europ\u00e9en touchera le sol invisible de Titan.<\/p>","protected":false},"excerpt":{"rendered":"

One of the most exciting chapters in the history of space exploration is about to begin. After a 3 billion km trek that lasted more than seven years, ESA\u2019s Huygens […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/10\/huygens_probe_descending_through_titan_s_atmosphere4\/18244995-2-eng-GB\/Huygens_probe_descending_through_Titan_s_atmosphere.jpg","esa_banner_description":"Huygens probe descending through Titan's atmosphere","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/10\/Huygens_probe_descending_through_Titan_s_atmosphere4","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,12],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-965","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/965","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=965"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/965\/revisions"}],"predecessor-version":[{"id":4758,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/965\/revisions\/4758"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=965"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=965"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=965"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=965"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=965"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=965"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=965"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}