{"id":441,"date":"2017-04-28T07:51:00","date_gmt":"2017-04-28T05:51:00","guid":{"rendered":"https:\/\/kids.esa.int\/countdown_to_cassini_s_grand_finale\/"},"modified":"2026-10-08T00:28:15","modified_gmt":"2026-10-07T22:28:15","slug":"countdown_to_cassini_s_grand_finale","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/countdown_to_cassini_s_grand_finale\/","title":{"rendered":"Compte \u00e0 rebours avant la grande finale de Cassini"},"content":{"rendered":"<div class=\"lede\">\n<p>Apr\u00e8s pr\u00e8s de 13 ans pass\u00e9s en orbite autour de Saturne, la mission Cassini\u2013Huygens touche \u00e0 sa fin ! La s\u00e9rie de plong\u00e9es p\u00e9rilleuses entre la plan\u00e8te et ses anneaux, que la sonde effectue actuellement, pr\u00e9pare son plongeon final et sa destruction dans l\u2019atmosph\u00e8re de Saturne programm\u00e9s pour le 15 septembre.<\/p>\n<\/div>\n<figure class=\"wp-block-image size-large\" data-width=\"1489\" data-credit=\"ESA-D. DUCROS\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/04\/Cassini_sent_the_Huygens_probe_to_land_on_Saturn_s_moon_Titan\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/04\/cassini_sent_the_huygens_probe_to_land_on_saturn_s_moon_titan\/17909382-2-eng-GB\/Cassini_sent_the_Huygens_probe_to_land_on_Saturn_s_moon_Titan.jpg\" alt=\"Cassini sent the Huygens probe to land on Saturn\u2019s moon Titan\"><figcaption>Cassini a envoy\u00e9 la sonde Huygens se poser sur Titan, la lune de Saturne<\/figcaption><\/figure>\n<p>Lanc\u00e9e depuis la Terre en 1997, la mission Cassini-Huygens a ensuite pass\u00e9 sept ans \u00e0 voyager \u00e0 travers le syst\u00e8me solaire avant d\u2019atteindre Saturne. La sonde \u00ab porteuse \u00bb Cassini a rel\u00e2ch\u00e9 quelques mois plus tard la sonde Huygens de l\u2019ESA, qui a atterri sur Titan, la lune myst\u00e9rieuse de Saturne, r\u00e9alisant le premier atterrissage jamais effectu\u00e9 aussi loin dans notre syst\u00e8me solaire. Huygens nous a r\u00e9v\u00e9l\u00e9 que Titan a un climat froid, une temp\u00e9rature en surface de \u2013180\u00b0C et des lacs remplis de m\u00e9thane. C\u2019est en fait un endroit tr\u00e8s \u00e9trange !<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1580\" data-credit=\"NASA\/JPL\/Space Science\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/04\/Cassini_photographed_jets_of_water_blasting_out_from_the_icy_moon_Enceladus\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/04\/cassini_photographed_jets_of_water_blasting_out_from_the_icy_moon_enceladus\/17910640-2-eng-GB\/Cassini_photographed_jets_of_water_blasting_out_from_the_icy_moon_Enceladus.jpg\" alt=\"Cassini photographed jets of water blasting out from the icy moon Enceladus\"><figcaption>Cassini a photographi\u00e9 des jets d'eau jaillissant de la lune glac\u00e9e Encelade<\/figcaption><\/figure>\n<p>Cassini a ensuite abandonn\u00e9 Huygens sur Titan pour continuer \u00e0 explorer Saturne, ses anneaux et sa tribu de lunes. Au cours de son p\u00e9riple, Cassini a d\u00e9couvert des panaches de vapeur d\u2019eau en provenance d\u2019une lune glac\u00e9e baptis\u00e9e Encelade. Ces geysers sont un indice de la pr\u00e9sence d\u2019un oc\u00e9an d\u2019eau liquide sous la surface gel\u00e9e de cette lune. Cassini a m\u00eame trouv\u00e9 de l\u2019hydrog\u00e8ne gazeux dans l\u2019eau analys\u00e9e, ce qui indique qu\u2019il pourrait y avoir de l\u2019\u00e9nergie chimique, qui est un possible ingr\u00e9dient de formes de vie simples, dans cet oc\u00e9an cach\u00e9 !<\/p>\n<p>Cassini aura bient\u00f4t \u00e9puis\u00e9 son carburant et les scientifiques de la mission ont d\u00e9cid\u00e9 de mettre fin \u00e0 son voyage en la faisant plonger dans l\u2019atmosph\u00e8re de Saturne. L\u2019objectif est d\u2019\u00e9viter que la sonde ne s\u2019\u00e9crase accidentellement sur une des lunes de Saturne, qui resteront ainsi intactes pour de futures \u00e9tudes.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1600\" data-credit=\"NASA\/JPL-Caltech\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/04\/On_15_September_2017_Cassini_will_plunge_into_the_atmosphere_of_Saturn\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/04\/on_15_september_2017_cassini_will_plunge_into_the_atmosphere_of_saturn\/18249362-2-eng-GB\/On_15_September_2017_Cassini_will_plunge_into_the_atmosphere_of_Saturn.jpg\" alt=\"On 15 September 2017, Cassini will plunge into the atmosphere of Saturn\"><figcaption>Le 15 septembre 2017, Cassini plongera dans l'atmosph\u00e8re de Saturne<\/figcaption><\/figure>\n<p>Avant sa destruction, Cassini passera ses derniers mois \u00e0 voler dans la zone situ\u00e9e entre Saturne et ses anneaux. Une zone jamais explor\u00e9e jusqu\u2019alors ! Cassini prendra les photos les plus nettes jamais r\u00e9alis\u00e9es des anneaux internes de Saturne et des nuages de cette plan\u00e8te. La sonde mesurera aussi le champ de gravitationnel de Saturne, ce qui aidera les sp\u00e9cialistes \u00e0 se faire une id\u00e9e de ce \u00e0 quoi ressemble l\u2019int\u00e9rieur de la plan\u00e8te. Cassini contribue aujourd\u2019hui encore \u00e0 de nouvelles d\u00e9couvertes !<\/p>\n<p><b>Fait int\u00e9ressant :<\/b> Cassini utilisera un appareil appel\u00e9 \u00ab Cosmic Dust Analyzer \u00bb pour \u00e9tudier les minuscules particules des anneaux de Saturne !<\/p>","protected":false},"excerpt":{"rendered":"<p>After spending nearly 13 years orbiting the planet Saturn, the Cassini\u2013Huygens mission will soon be over! The spacecraft is now performing a series of daring dives between the planet and [&hellip;]<\/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\/2017\/04\/cassini_will_pass_through_unexplored_areas_between_the_planet_saturn_and_its_rings\/17877479-2-eng-GB\/Cassini_will_pass_through_unexplored_areas_between_the_planet_Saturn_and_its_rings.jpg","esa_banner_description":"Cassini will pass through unexplored areas between the planet Saturn and its rings","esa_banner_credit":"NASA\/JPL-Caltech","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/04\/Cassini_will_pass_through_unexplored_areas_between_the_planet_Saturn_and_its_rings","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-441","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\/441","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=441"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/441\/revisions"}],"predecessor-version":[{"id":4477,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/441\/revisions\/4477"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=441"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=441"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=441"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=441"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=441"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=441"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=441"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}