{"id":1131,"date":"2004-11-16T08:19:00","date_gmt":"2004-11-16T07:19:00","guid":{"rendered":"https:\/\/kids.esa.int\/mars_valleys_and_volcanoes\/"},"modified":"2026-10-08T00:36:21","modified_gmt":"2026-10-07T22:36:21","slug":"mars_valleys_and_volcanoes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/mars_valleys_and_volcanoes\/","title":{"rendered":"Mars\u2019 dale og vulkaner"},"content":{"rendered":"
\n

Billeder, der er sendt tilbage af rumfart\u00f8jer som f.eks. ESA\u2019s Mars Express, viser, at Mars har mange store nedslagskratere. De fleste af disse ligger syd for \u00e6kvator. De ser ud til at v\u00e6re dannet, da meteoritter ramte overfladen for milliarder af \u00e5r siden. Det st\u00f8rste krater har en diameter p\u00e5 ca. 1800 km \u2013 stort nok til at rumme halvdelen af Europa.<\/p>\n<\/div>\n

Mars\u2019 overflade har dog \u00e6ndret sig i l\u00f8bet af planetens levetid. Et af de mest i\u00f8jnefaldende tr\u00e6k er det enorme dal-system \u2013 Valles Marineris \u2013 t\u00e6t p\u00e5 planetens \u00e6kvator. Med en l\u00e6ngde p\u00e5 omkring 5000 km ville det str\u00e6kke sig hele vejen fra Paris til New York.<\/p>\n

\"Perspective
Perspektivbillede af aflejringer i Melas Chasma<\/figcaption><\/figure>\n

Dalene ser ud til at v\u00e6re dannet ved revnedannelse i planetens overflade, da den stenede skorpe blev strakt og revet fra hinanden. Dalene er nu s\u00e5 brede, at en person, der st\u00e5r p\u00e5 den ene kant, ikke ville kunne se den anden side.<\/p>\n

\"\"<\/figure>\n

Ikke langt mod vest ligger der fem enorme vulkaner. Den mest imponerende af dem alle er Olympus Mons, den st\u00f8rste vulkan i solsystemet. Den er bredere end England og tre gange h\u00f8jere end Mount Everest, det h\u00f8jeste bjerg p\u00e5 Jorden. Ingen af disse vulkaner er aktive i \u00f8jeblikket.<\/p>","protected":false},"excerpt":{"rendered":"

Pictures sent back by spacecraft such as ESA’s Mars Express show that Mars has many large impact craters. Most of these are to the south of the equator. They seem […]<\/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\/11\/crater_hale_in_argyre_basin3\/17910048-2-eng-GB\/Crater_Hale_in_Argyre_basin.jpe","esa_banner_description":"Crater Hale in Argyre basin","esa_banner_credit":"ESA\/DLR\/FU Berlin (G. Neukum)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/11\/Crater_Hale_in_Argyre_basin3","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-1131","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\/1131","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=1131"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1131\/revisions"}],"predecessor-version":[{"id":4864,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1131\/revisions\/4864"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1131"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1131"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1131"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1131"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1131"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1131"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1131"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}