{"id":922,"date":"2004-11-15T15:45:00","date_gmt":"2004-11-15T14:45:00","guid":{"rendered":"https:\/\/kids.esa.int\/water_on_mars\/"},"modified":"2026-10-08T00:33:48","modified_gmt":"2026-10-07T22:33:48","slug":"water_on_mars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/water_on_mars\/","title":{"rendered":"Vand p\u00e5 Mars"},"content":{"rendered":"
\n

P\u00e5 mange m\u00e5der er Mars den planet, der ligner Jorden mest. En bes\u00f8gende ville opdage, at en dag p\u00e5 Mars kun er lidt l\u00e6ngere end en dag p\u00e5 Jorden. Mars h\u00e6lder desuden omtrent lige s\u00e5 meget som Jorden, s\u00e5 der er \u00e5rstider p\u00e5 planeten.<\/p>\n<\/div>\n

B\u00e5de Mars og Jorden har hvide polkapper. Polkapperne p\u00e5 Mars er meget mindre og tyndere, s\u00e5 de vokser hurtigt om vinteren og forsvinder n\u00e6sten helt om sommeren. De er meget koldere end polkapperne p\u00e5 Jorden, s\u00e5 de best\u00e5r af frosset kuldioxid (det \u2018t\u00f8ris\u2019, der bruges til at skabe t\u00e5ge i teaterforestillinger) samt vandis.<\/p>\n

\"Cracks
Revner p\u00e5 Mars tyder p\u00e5, at der findes vand<\/figcaption><\/figure>\n

Mars befinder sig midt i en istid, s\u00e5 der kan p\u00e5 nuv\u00e6rende tidspunkt ikke findes flydende vand p\u00e5 planetens overflade. Planeten synes dog at have v\u00e6ret varmere og mere fugtig i fortiden.<\/p>\n

P\u00e5 billeder taget af rumfart\u00f8jer ses snoede kanaler, der ligner udt\u00f8rrede flodlejer. De tyder p\u00e5, at der engang str\u00f8mmede enorme m\u00e6ngder vand over overfladen \u2013 muligvis fra smeltende is. Der kan endda have v\u00e6ret regn og sne. Mange af kanalerne ser ud til at have fyldt store kratere eller l\u00f8bet ud p\u00e5 de nordlige sletter. Nogle forskere mener, at der engang var et stort hav, der d\u00e6kkede den nordlige halvdel af Mars.<\/p>\n

Hvor er vandet blevet af? En del er m\u00e5ske str\u00f8mmet ud i rummet. Resten ligger frosset fast i jorden.<\/p>","protected":false},"excerpt":{"rendered":"

In many ways, Mars is the most Earthlike of all the planets. A visitor would find that a day on Mars is only slightly longer than one on Earth. Mars […]<\/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\/2004\/01\/omega_image_of_the_southern_polar_cap_of_mars_18_january2\/17912443-2-eng-GB\/OMEGA_image_of_the_southern_polar_cap_of_Mars_18_January.jpg","esa_banner_description":"OMEGA image of the southern polar cap of Mars 18 January","esa_banner_credit":"ESA - OMEGA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/01\/OMEGA_image_of_the_southern_polar_cap_of_Mars_18_January2","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-922","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\/922","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=922"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/922\/revisions"}],"predecessor-version":[{"id":4741,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/922\/revisions\/4741"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=922"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=922"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=922"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=922"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=922"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=922"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=922"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}