{"id":849,"date":"2010-02-25T13:30:00","date_gmt":"2010-02-25T12:30:00","guid":{"rendered":"https:\/\/kids.esa.int\/mars_express_and_the_mystery_of_phobos\/"},"modified":"2026-10-08T00:32:58","modified_gmt":"2026-10-07T22:32:58","slug":"mars_express_and_the_mystery_of_phobos","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/mars_express_and_the_mystery_of_phobos\/","title":{"rendered":"Mars Express og mysteriet om Phobos"},"content":{"rendered":"

ESA\u2019s Mars Express-rumsonde har sendt bem\u00e6rkelsesv\u00e6rdige billeder og andre data tilbage, siden den n\u00e5ede den R\u00f8de Planet i december 2003. Selvom Mars er dens prim\u00e6re m\u00e5l, f\u00f8rer rumfart\u00f8jets pol\u00e6re bane den undertiden t\u00e6t forbi Phobos, den st\u00f8rste af planetens to m\u00e5ner. Under den seneste r\u00e6kke af forbiflyvninger, mellem den 16. februar og den 26. marts, vil Mars Express den 3. marts s\u00e6tte en ny rekord ved at suse forbi inden for 50 km fra dens overflade. De data, der indsamles under disse t\u00e6tte forbiflyvninger, kan m\u00e5ske bidrage til at l\u00f8se nogle af mysterierne omkring den fascinerende lille m\u00e5ne.<\/p>\n

\"Mars
Mars Express<\/figcaption><\/figure>\n

Billeder sendt tilbage fra Mars Express og andre rumfart\u00f8jer viser, at Phobos er en medtaget, kartoffelformet klippe med en diameter p\u00e5 under 28 km. Den f\u00f8lger en n\u00e6sten cirkul\u00e6r bane langs \u00e6kvator, ca. 6000 km over planetens overflade. For at undg\u00e5 at styrte ned p\u00e5 Mars er den n\u00f8dt til at bev\u00e6ge sig meget hurtigt rundt i sin bane. Hver oml\u00f8bsperiode varer 7 timer og 39 minutter, s\u00e5 en person, der stod p\u00e5 planeten, ville se Phobos krydse himlen fra vest mod \u00f8st tre gange om dagen.<\/p>\n

De fleste forskere mener, at denne lille rumsten er en asteroide, der kom for t\u00e6t p\u00e5 Mars og blev fanget af planetens tyngdekraft. Det er dog meget sv\u00e6rt at forklare, hvordan Phobos n\u00e5ede sin nuv\u00e6rende bane. De fleste indfangede m\u00e5ner f\u00f8lger meget elliptiske (\u00e6gformede) baner langt fra deres planet. Mars Express kan m\u00e5ske v\u00e6re med til at l\u00f8se dette mysterium. Ved at unders\u00f8ge, hvordan Phobos\u2019 tyngdekraft tr\u00e6kker i rumfart\u00f8jet og \u00e6ndrer dets bane, vil forskerne f\u00e5 mere at vide om m\u00e5nens indre. Tidligere data har antydet, at Phobos muligvis er en por\u00f8s klippemasse med mange hulrum.<\/p>","protected":false},"excerpt":{"rendered":"

ESA\u2019s Mars Express orbiter has been sending back remarkable images and other data since it reached the Red Planet in December 2003. Although Mars is its primary target, the spacecraft\u2019s […]<\/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\/2009\/12\/phobos_up_close2\/17873150-2-eng-GB\/Phobos_up_close.jpg","esa_banner_description":"Phobos up close","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\/2009\/12\/Phobos_up_close2","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":[10,65,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-849","post","type-post","status-publish","format-standard","hentry","category-learn","category-mission-control","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/849","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=849"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/849\/revisions"}],"predecessor-version":[{"id":4706,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/849\/revisions\/4706"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=849"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=849"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=849"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=849"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=849"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=849"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=849"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}