{"id":968,"date":"2005-01-19T09:08:00","date_gmt":"2005-01-19T08:08:00","guid":{"rendered":"https:\/\/kids.esa.int\/sounds_of_an_alien_world\/"},"modified":"2026-10-08T00:34:19","modified_gmt":"2026-10-07T22:34:19","slug":"sounds_of_an_alien_world","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/sounds_of_an_alien_world\/","title":{"rendered":"Des sons venus d'un monde extraterrestre"},"content":{"rendered":"<p>Entre autres prouesses scientifiques, Huygens a d\u00e9sormais \u00e0 son actif le premier enregistrement de sons renvoy\u00e9s d'un autre monde.<\/p>\n<p>Pendant sa longue descente en parachute dans l'atmosph\u00e8re \u00e9paisse du satellite, en effet, un \u201cmicrophone\u201d plac\u00e9 \u00e0 l'ext\u00e9rieur de la sonde a recueilli les sons de Titan.<\/p>\n<p>Simultan\u00e9ment, l'altim\u00e8tre radar de Huygens a permis de recueillir l'\u00e9cho des signaux radio r\u00e9fl\u00e9chis par la surface du satellite.<\/p>\n<h2>1. Filer \u00e0 toute allure \u00e0 travers la brume de Titan<\/h2>\n<figure class=\"wp-block-image size-natural\" data-width=\"546\" data-credit=\"ESA\/NASA\/JPL\/University of Arizona\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/01\/First_colour_view_of_Titan_s_surface2\" 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\/2005\/01\/first_colour_view_of_titan_s_surface2\/17907791-2-eng-GB\/First_colour_view_of_Titan_s_surface.png\" alt=\"First colour view of Titan&#x27;s surface\"><figcaption>Premi\u00e8re image en couleur de la surface de Titan<\/figcaption><\/figure>\n<p>.myLink {color:blue}.myLink:hover {color:aa3333;text-decoration:underline}Cet enregistrement est une reconstitution des sons capt\u00e9s par le microphone de Huygens. Plusieurs extraits sonores, enregistr\u00e9s \u00e0 diff\u00e9rents moments, ont \u00e9t\u00e9 assembl\u00e9s pour former une piste audio d'une minute.<\/p>\n<p>Le r\u00e9sultat est une reproduction r\u00e9aliste de ce qu\u2019aurait entendu un voyageur \u00e0 bord de Huygens pendant la descente. Les variations d\u2019intensit\u00e9 sonore peuvent \u00eatre dues \u00e0 des vents violents, \u00e0 la pluie ou au tonnerre.<br \/><a href=\"http:\/\/esamultimedia.esa.int\/images\/huygens_alien_winds_descent.mp3\" target=\"_blank\" rel=\"noopener\">Fichier 1 : enregistrement acoustique pendant la descente<\/a><\/p>\n<h2>2. \u00c9chos radar provenant de la surface de Titan<\/h2>\n<p>.myLink {color:blue}.myLink:hover {color:aa3333;text-decoration:underline} Cet enregistrement a \u00e9t\u00e9 \u00e9labor\u00e9 en convertissant en sons certains \u00e9chos radar re\u00e7us par Huygens pendant les derniers kilom\u00e8tres de sa descente. Plus la sonde se rapproche du sol, plus l'intensit\u00e9 et la fr\u00e9quence des \"bips\" augmentent \u2013 un peu comme le vrombissement d'une moto qui acc\u00e9l\u00e8re. L'analyse de ces \u00e9chos permettra aux chercheurs de calculer les changements d'altitude de la sonde. Ils pourraient m\u00eame nous dire si la surface de Titan est solide ou liquide, dure ou molle.<\/p>\n<p>En analysant ces \u00e9chos, les scientifiques pourront calculer les variations d'altitude de la sonde. Ils pourraient m\u00eame \u00eatre en mesure de d\u00e9terminer si la surface \u00e9tait solide ou liquide, rugueuse ou lisse.<br \/><a href=\"http:\/\/esamultimedia.esa.int\/images\/huygens_alien_winds_descent_radar.mp3\" target=\"_blank\" rel=\"noopener\">Fichier 2 : conversion radar<\/a><\/p>\n<p>Fichier 2 : conversion radar<\/p>\n<nav class=\"related\" aria-label=\"\u00c0 lire \u00e9galement\">\n<h2 class=\"related__heading\">\u00c0 lire \u00e9galement<\/h2>\n<div class=\"grid related__grid\">\n<div class=\"grid-item\">\n<article class=\"card focuson agency\"><a class=\"card__link\" href=\"http:\/\/www.esa.int\/SPECIALS\/Kids_Comic\/index.html\" target=\"_blank\" rel=\"noopener\"><\/p>\n<figure class=\"thumbnail\"><span class=\"dimmer\"><\/span><\/figure>\n<header class=\"entry\">\n<h3 class=\"heading\">comic_episode03_strillo<\/h3>\n<\/header>\n<p><\/a><\/article>\n<\/div>\n<\/div>\n<\/nav>","protected":false},"excerpt":{"rendered":"<p>Among the many scientific achievements of Huygens was the first ever recording of sounds sent back from another world. During the long parachute descent through the satellite\u2019s dense atmosphere, the [&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\/2005\/01\/sounds_of_an_alien_world2\/17868894-2-eng-GB\/Sounds_of_an_alien_world.jpg","esa_banner_description":"Sounds of an alien world","esa_banner_credit":"ESA\/NASA\/JPL & Observatoire de Paris-Meudon (M. Fulchignoni)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/01\/Sounds_of_an_alien_world2","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-968","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/968","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=968"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/968\/revisions"}],"predecessor-version":[{"id":4761,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/968\/revisions\/4761"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=968"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=968"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=968"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=968"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=968"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=968"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=968"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=968"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=968"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=968"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}