{"id":879,"date":"2006-07-27T09:13:00","date_gmt":"2006-07-27T07:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/methane_lakes_and_ice_pebbles\/"},"modified":"2026-10-08T00:33:18","modified_gmt":"2026-10-07T22:33:18","slug":"methane_lakes_and_ice_pebbles","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/methane_lakes_and_ice_pebbles\/","title":{"rendered":"Metansj\u00f6ar och isstenar"},"content":{"rendered":"
\n

Saturnus m\u00e5ne Titan \u00e4r en av de st\u00f6rsta och mest fascinerande m\u00e5narna i solsystemet. Tyv\u00e4rr \u00e4r dess yta dold bakom ett tjockt t\u00e4cke av orangea moln. Fram till nyligen visste ingen hur Titans yta ser ut.<\/p>\n<\/div>\n

Ett s\u00e4tt att tr\u00e4nga igenom molnlagret \u00e4r att anv\u00e4nda radarinstrumentet p\u00e5 NASA:s rymdsond Cassini. Radiosignaler fr\u00e5n Cassini passerar genom molnen och studsar tillbaka fr\u00e5n ytan. Genom att studera ekona har forskarna nyligen kunnat uppt\u00e4cka m\u00e5nga m\u00f6rka fl\u00e4ckar. Vissa av fl\u00e4ckarna \u00e4r kopplade till smala, slingrande kanaler \u2013 m\u00f6jligen floder.<\/p>\n

Det verkar troligt att de j\u00e4mna, m\u00f6rka omr\u00e5dena p\u00e5 radarbilderna \u00e4r sj\u00f6ar. Eftersom yttemperaturen p\u00e5 Titan \u00e4r -180 \u00b0C kan de dock inte inneh\u00e5lla vatten. Ist\u00e4llet verkar de best\u00e5 av flytande metan eller etan. (P\u00e5 jorden anv\u00e4nds metangas i v\u00e4rmepannor och spisar.)<\/p>\n

\"First
Den f\u00f6rsta f\u00e4rgbilden av Titans yta<\/figcaption><\/figure>\n

M\u00e5nga hoppades att ESA:s sond Huygens skulle landa i en metansj\u00f6 under sin nedstigning mot ytan den 14 januari 2005. Men dess kamera visade en torr sl\u00e4tt t\u00e4ckt av isstenar.<\/p>\n

Sedan denna spektakul\u00e4ra framg\u00e5ng har forskarna hittat ett ovanligt s\u00e4tt att l\u00e4ra sig mer om Huygens omgivning. Nyckeln var ett ovanligt upp- och nedg\u00e5ende m\u00f6nster i radiosignalen fr\u00e5n Huygens till Cassini. En del av radiostr\u00e5len reflekterades fr\u00e5n ytan och gick inte rakt till Cassini. Analysen av signalen visade att ytan \u00e4r ganska plan upp till 2 km fr\u00e5n sonden. Denna torra sj\u00f6botten \u00e4r till st\u00f6rsta delen t\u00e4ckt av isstenar med en diameter p\u00e5 cirka 5\u201310 cm.<\/p>","protected":false},"excerpt":{"rendered":"

Saturn\u2019s moon Titan is one of the largest and most fascinating satellites in the Solar System. Unfortunately, its surface is hidden beneath a thick blanket of orange cloud. Until recently, […]<\/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\/2006\/07\/lakes_on_titan2\/18249176-2-eng-GB\/Lakes_on_Titan.jpg","esa_banner_description":"Lakes on Titan","esa_banner_credit":"NASA\/JPL","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/07\/Lakes_on_Titan2","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-879","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\/sv\/wp-json\/wp\/v2\/posts\/879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=879"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/879\/revisions"}],"predecessor-version":[{"id":4716,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/879\/revisions\/4716"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=879"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=879"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=879"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=879"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=879"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=879"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=879"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}