{"id":1121,"date":"2004-11-15T16:17:00","date_gmt":"2004-11-15T15:17:00","guid":{"rendered":"https:\/\/kids.esa.int\/moon_phases\/"},"modified":"2026-10-08T00:36:14","modified_gmt":"2026-10-07T22:36:14","slug":"moon_phases","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/moon_phases\/","title":{"rendered":"M\u00e5nefaser"},"content":{"rendered":"
\n

For millioner af \u00e5r siden var M\u00e5nen meget t\u00e6ttere p\u00e5 og st\u00f8rre p\u00e5 himlen. Den drejede ogs\u00e5 meget hurtigere rundt. Gradvist blev den langsommere. I dag fuldf\u00f8rer M\u00e5nen en omdrejning hver 27. dag, hvilket er den samme tid, det tager at kredse \u00e9n gang rundt om Jorden. Det betyder, at vi altid ser den samme side af M\u00e5nen. Den fjerne side er altid skjult for vores blik.<\/p>\n<\/div>\n

M\u00e5nen har ikke noget eget lys. Den lyser ved at reflektere sollys. Ligesom Jorden er den ene halvdel af M\u00e5nen i dagslys, mens den anden halvdel er i m\u00f8rke (nat). Nogle gange kan vi se hele dagsiden \u2013 det kaldes \u2018fuldm\u00e5ne\u2019.<\/p>\n

Nogle gange ser vi kun et smalt, buet lysb\u00e5nd, der kaldes en \u2018halvm\u00e5ne\u2019. Nogle gange kan vi slet ikke se M\u00e5nen, fordi vi kigger p\u00e5 dens natside. Det er \u2018nym\u00e5nen\u2019.<\/p>\n

Siden tidernes morgen har mennesker iagttaget, hvordan M\u00e5nen tilsyneladende skifter form fra en tynd halvm\u00e5ne til fuldm\u00e5ne og tilbage igen. Disse \u2018faser\u2019 skyldes, at M\u00e5nen kredser om Jorden \u00e9n gang hver 29\u00bd dag. Denne \u2018m\u00e5ned\u2019 har i tusinder af \u00e5r v\u00e6ret brugt til at m\u00e5le tiden over hele verden.<\/p>","protected":false},"excerpt":{"rendered":"

Millions of years ago, the Moon was much closer and bigger in the sky. It was also spinning much faster. Gradually, it slowed down. Today, the Moon completes one turn […]<\/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\/2003\/02\/a_quarter_moon_seen_by_the_space_shuttle_columbia2\/17882695-2-eng-GB\/A_quarter_moon_seen_by_the_Space_Shuttle_Columbia.jpg","esa_banner_description":"Quarter moon seen by the Space Shuttle","esa_banner_credit":"AP Photo\/NASA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/02\/A_quarter_moon_seen_by_the_Space_Shuttle_Columbia2","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-1121","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\/1121","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=1121"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1121\/revisions"}],"predecessor-version":[{"id":2264,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1121\/revisions\/2264"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1121"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1121"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1121"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1121"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1121"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1121"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1121"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}