{"id":974,"date":"2005-12-06T09:41:00","date_gmt":"2005-12-06T08:41:00","guid":{"rendered":"https:\/\/kids.esa.int\/titan_s_wintry_wonderland\/"},"modified":"2026-10-08T00:34:24","modified_gmt":"2026-10-07T22:34:24","slug":"titan_s_wintry_wonderland","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/titan_s_wintry_wonderland\/","title":{"rendered":"Titanin talvinen ihmemaa"},"content":{"rendered":"<div class=\"lede\">\n<p>14. tammikuuta 2005 ESAn Huygens-luotain laskeutui historiallisesti Saturnuksen j\u00e4ttil\u00e4ism\u00e4isen kuun, Titanin, pinnalle. Nyt, kun Huygensin tiedot on analysoitu huolellisesti, tutkijat ovat selvitt\u00e4neet monia t\u00e4m\u00e4n planeetan kokoisen kuun mysteerej\u00e4.<\/p>\n<\/div>\n<p>2 \u00bd tunnin laskeutumisen aikana mittalaitteet tallensivat tietoja l\u00e4mp\u00f6tilasta, tuulen nopeudesta ja ilmakeh\u00e4n koostumuksesta. Tulokset osoittavat, ett\u00e4 Huygensin matka oli kuoppainen, sill\u00e4 se ajautui it\u00e4\u00e4n yli 100 km\/h puhaltavien korkean tason tuulien mukana. Kun se kuitenkin laskeutui oranssinv\u00e4risen sumun l\u00e4pi, ilmakeh\u00e4n l\u00e4mp\u00f6tila ja tiheys kasvoivat ja tuulen nopeus hidastui. Tuulet k\u00e4\u00e4ntyiv\u00e4t suunnan 7 kilometrin korkeudella ja kuljettivat Huygensia lempe\u00e4sti l\u00e4nteen laskeutumisen viimeisin\u00e4 minuutteina.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"NASA\/JPL\/Space Science Institute\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/11\/Location_of_landing_site2\" 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\/11\/location_of_landing_site2\/17904712-2-eng-GB\/Location_of_landing_site.jpg\" alt=\"Location of landing site\"><figcaption>Laskeutumispaikan sijainti<\/figcaption><\/figure>\n<p>Ilmakeh\u00e4 koostui p\u00e4\u00e4osin typest\u00e4, ja siin\u00e4 oli noin 5 prosenttia metaania; my\u00f6s ilmakeh\u00e4n sumu koostui p\u00e4\u00e4osin metaanista. (Maapallolla metaanikaasua poltetaan kattiloissa ja liesiss\u00e4.)<\/p>\n<p>Teht\u00e4v\u00e4n aikana ker\u00e4tyt noin 350 kuvaa paljastivat j\u00e4isen maiseman, jota leimasivat tummat kanavat, jotka kiemurtelivat kohti sile\u00e4\u00e4 \u2018rannikkoa\u2019. Metaanisateet t\u00e4ytt\u00e4v\u00e4t toisinaan kuivat kanavat ja muodostavat v\u00e4liaikaisia jokia, jotka kuluttavat pintaa ja kuljettavat irtomateriaalia l\u00e4heisille tasangoille.<\/p>\n<p>Tasainen alankoalue, jolle Huygens laskeutui, oli t\u00e4ynn\u00e4 kivi\u00e4 tai pieni\u00e4 j\u00e4\u00e4palasia. Vaikka pinta oli melko pehme\u00e4, v\u00e4h\u00e4n kuin kevyesti tiivistynytt\u00e4 lunta, se oli eritt\u00e4in kylm\u00e4 (-180 \u00b0C) \u2013 paljon kylmempi kuin Etel\u00e4mantereella. Hienorakeinen j\u00e4\u00e4 oli metaanin kastelemaa, ja metaani haihtui, kun l\u00e4mmin luotain kosketti sit\u00e4.<\/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>On 14 January 2005 ESA&#8217;s Huygens probe made an historic landing on the surface of Saturn&#8217;s giant satellite, Titan. Now, after careful analysis of the Huygens data, scientists have unravelled [&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\/11\/huygens_descent_and_landing_in_20052\/17888579-2-eng-GB\/Huygens_descent_and_landing_in_2005.jpg","esa_banner_description":"Huygens' descent and landing in 2005","esa_banner_credit":"ESA - D. Ducros","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/11\/Huygens_descent_and_landing_in_20052","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-974","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\/fi\/wp-json\/wp\/v2\/posts\/974","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=974"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/974\/revisions"}],"predecessor-version":[{"id":4767,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/974\/revisions\/4767"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=974"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=974"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=974"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=974"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=974"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=974"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=974"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}