{"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\/fi\/sounds_of_an_alien_world\/","title":{"rendered":"Muukalaismaailman \u00e4\u00e4net"},"content":{"rendered":"<p>Yksi Huygensin lukuisista tieteellisist\u00e4 saavutuksista oli ensimm\u00e4inen koskaan tehty tallenne toisesta maailmasta l\u00e4hetetyist\u00e4 \u00e4\u00e4nist\u00e4.<\/p>\n<p>Pitk\u00e4n laskuvarjohyppyn aikana satelliitin tihe\u00e4n ilmakeh\u00e4n l\u00e4pi luotaimen ulkopuolella sijaitseva \u201cmikrofoni\u201d tallensi Titanin \u00e4\u00e4ni\u00e4.<\/p>\n<p>Samaan aikaan Huygensin tutka-korkeusmittari heijasti radiosignaaleja Titanin pinnasta.<\/p>\n<h2>1. Vauhdilla Titanin sumun l\u00e4pi<\/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>Ensimm\u00e4inen v\u00e4rikuva Titanin pinnasta<\/figcaption><\/figure>\n<p>.myLink {color:blue}.myLink:hover {color:aa3333;text-decoration:underline}T\u00e4m\u00e4 \u00e4\u00e4nitallenne on rekonstruktio \u00e4\u00e4nist\u00e4, jotka Huygensin mikrofoni on tallentanut. Useita eri aikoina otettuja \u00e4\u00e4nin\u00e4ytteit\u00e4 on yhdistetty yhden minuutin pituiseksi \u00e4\u00e4niraidaksi.<\/p>\n<p>Tuloksena on realistinen kuvaus siit\u00e4, mit\u00e4 Huygens-luotaimen kyydiss\u00e4 ollut matkustaja olisi kuullut laskeutumisen aikana. \u00c4\u00e4nenvoimakkuuden vaihtelut voivat johtua myrskytuulista, sateesta tai ukkosesta.<br \/><a href=\"http:\/\/esamultimedia.esa.int\/images\/huygens_alien_winds_descent.mp3\" target=\"_blank\" rel=\"noopener\">Tiedosto 1: \u00e4\u00e4ni laskeutumisen aikana<\/a><\/p>\n<h2>2. Titanin pinnalta heijastuvat tutkaheijastukset<\/h2>\n<p>.myLink {color:blue}.myLink:hover {color:aa3333;text-decoration:underline}T\u00e4m\u00e4 \u00e4\u00e4nitallenne on tuotettu muuntamalla \u00e4\u00e4neksi osa Huygensin laskeutumisen viimeisten kilometrien aikana vastaanottamista tutkaheijastuksista. Kun luotain l\u00e4hestyy maata, \u00e4\u00e4nen korkeus ja voimakkuus kasvavat \u2013 aivan kuin moottoripy\u00f6r\u00e4n kierrosten noustessa.<\/p>\n<p>Analysoimalla kaikuja tutkijat pystyv\u00e4t laskemaan luotaimen korkeuden muutokset. He saattavat jopa pysty\u00e4 selvitt\u00e4m\u00e4\u00e4n, oliko pinta kiinte\u00e4\u00e4 vai nestem\u00e4ist\u00e4, karheaa vai sile\u00e4\u00e4.<br \/><a href=\"http:\/\/esamultimedia.esa.int\/images\/huygens_alien_winds_descent_radar.mp3\" target=\"_blank\" rel=\"noopener\">Tiedosto 2: tutkan muuntaminen<\/a><\/p>\n<p>Kuva: ESA\/NASA\/ASI\/HASI-tiimi (M. Fulchignoni)<\/p>\n<nav class=\"related\" aria-label=\"Aiheeseen liittyv\u00e4t\">\n<h2 class=\"related__heading\">Aiheeseen liittyv\u00e4t<\/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\/fi\/wp-json\/wp\/v2\/posts\/968","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=968"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/968\/revisions"}],"predecessor-version":[{"id":4761,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/968\/revisions\/4761"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=968"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=968"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=968"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=968"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=968"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=968"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=968"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=968"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=968"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=968"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}