{"id":783,"date":"2011-01-25T15:27:00","date_gmt":"2011-01-25T14:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/moons\/"},"modified":"2026-10-08T00:32:12","modified_gmt":"2026-10-07T22:32:12","slug":"moons","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/moons\/","title":{"rendered":"M\u00e5ner"},"content":{"rendered":"
\n

M\u00e5ner er naturlige himmellegemer, der kredser om planeter. Forskere omtaler dem normalt som planetariske satellitter (menneskeskabte satellitter kaldes undertiden kunstige m\u00e5ner). Der er omkring 170 m\u00e5ner i vores solsystem. De fleste af dem kredser om gasgiganterne Jupiter og Saturn. Sm\u00e5 planeter har som regel kun f\u00e5 m\u00e5ner: Mars har to, Jorden har \u00e9n, mens Venus og Merkur ikke har nogen.<\/p>\n<\/div>\n

Jordens M\u00e5ne er us\u00e6dvanlig stor i forhold til planeten. De fleste m\u00e5ner virker sm\u00e5 i sammenligning med den planet, de kredser om. Nogle af Jupiters og Saturns m\u00e5ner er dog langt st\u00f8rre end vores M\u00e5ne. Ganymedes og Titan er st\u00f8rre end planeten Merkur.<\/p>\n

Deres lille st\u00f8rrelse betyder, at n\u00e6sten alle m\u00e5ner ikke er i stand til at fastholde en atmosf\u00e6re. Deres svage tyngdekraft g\u00f8r, at gasserne kan undslippe ud i rummet. Den eneste undtagelse er Titan, den st\u00f8rste m\u00e5ne i Saturns system. Titan har en tykkere og t\u00e6ttere atmosf\u00e6re end Jorden. Nitrogen er den dominerende gas i begge atmosf\u00e6rer, men p\u00e5 Titan findes der hverken ilt eller liv. Overfladen er skjult af en orange t\u00e5ge. Nogle forskere betragter Titan som en primitiv Jord i dybfrysning.<\/p>\n

Man mener, at nogle m\u00e5ner, herunder vores egen M\u00e5ne, blev dannet under voldsomme sammenst\u00f8d tidligt i solsystemets historie. M\u00e5nen blev dannet af den sky af vragdele, der blev efterladt i kredsl\u00f8b omkring Jorden. Andre m\u00e5ner kan v\u00e6re vokset frem af en sky af gas og st\u00f8v, der omgav de store planeter, da disse trak materiale ind. De fleste af de mindre m\u00e5ner er kometer eller asteroider, der blev indfanget, da de passerede for t\u00e6t p\u00e5 en stor planet.<\/p>","protected":false},"excerpt":{"rendered":"

Moons are natural objects that orbit planets. Scientists usually refer to them as planetary satellites (human-made satellites are sometimes called artificial moons). There are about 170 moons in our Solar […]<\/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\/2008\/04\/five_saturn_moons2\/17883435-2-eng-GB\/Five_Saturn_moons.jpg","esa_banner_description":"","esa_banner_credit":"NASA \/ JPL","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/04\/Five_Saturn_moons2","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-783","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\/da\/wp-json\/wp\/v2\/posts\/783","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=783"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/783\/revisions"}],"predecessor-version":[{"id":1926,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/783\/revisions\/1926"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=783"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=783"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=783"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=783"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=783"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=783"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=783"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}