{"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\/sv\/mars_valleys_and_volcanoes\/","title":{"rendered":"Mars dalar och vulkaner"},"content":{"rendered":"
\n

Bilder som skickats tillbaka av rymdfarkoster, s\u00e5som ESA:s Mars Express, visar att Mars har m\u00e5nga stora nedslagskratrar. De flesta av dessa ligger s\u00f6der om ekvatorn. De verkar ha bildats n\u00e4r meteoriter slog ner p\u00e5 ytan f\u00f6r miljarder \u00e5r sedan. Den st\u00f6rsta kratern \u00e4r cirka 1 800 km i diameter \u2013 tillr\u00e4ckligt stor f\u00f6r att rymma halva Europa.<\/p>\n<\/div>\n

Mars yta har dock f\u00f6r\u00e4ndrats under planetens livstid. Ett tydligt k\u00e4nnetecken \u00e4r det enorma dalsystemet \u2013 Valles Marineris \u2013 n\u00e4ra planetens ekvator. Med en l\u00e4ngd p\u00e5 cirka 5 000 km skulle det str\u00e4cka sig hela v\u00e4gen fr\u00e5n Paris till New York.<\/p>\n

\"Perspective
Perspektivvy \u00f6ver avlagringar i Melas Chasma<\/figcaption><\/figure>\n

Dalarna tycks ha bildats genom sprickbildning i planetens yta, n\u00e4r den steniga jordskorpan str\u00e4cktes ut och drogs is\u00e4r. Dalarna \u00e4r nu s\u00e5 breda att en person som st\u00e5r p\u00e5 ena kanten inte skulle kunna se den andra sidan.<\/p>\n

\"\"<\/figure>\n

Inte l\u00e5ngt v\u00e4sterut ligger fem enorma vulkaner. Den mest imponerande av dem alla \u00e4r Olympus Mons, den st\u00f6rsta vulkanen i solsystemet. Den \u00e4r bredare \u00e4n England och tre g\u00e5nger h\u00f6gre \u00e4n Mount Everest, jordens h\u00f6gsta berg. Ingen av dessa vulkaner \u00e4r f\u00f6r n\u00e4rvarande aktiv.<\/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\/sv\/wp-json\/wp\/v2\/posts\/1131","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=1131"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1131\/revisions"}],"predecessor-version":[{"id":4864,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1131\/revisions\/4864"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=1131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=1131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=1131"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=1131"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=1131"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=1131"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=1131"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=1131"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=1131"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=1131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}