{"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\/sv\/mars_express_and_the_mystery_of_phobos\/","title":{"rendered":"Mars Express och mysteriet kring Phobos"},"content":{"rendered":"

ESA:s rymdsond Mars Express har skickat tillbaka enast\u00e5ende bilder och annan data sedan den n\u00e5dde den r\u00f6da planeten i december 2003. \u00c4ven om Mars \u00e4r dess huvudm\u00e5l leder rymdsondens pol\u00e4ra bana den ibland n\u00e4ra Phobos, den st\u00f6rre av planetens tv\u00e5 m\u00e5nar. Under den senaste serien av f\u00f6rbiflygningar, mellan den 16 februari och den 26 mars, kommer Mars Express att s\u00e4tta ett nytt rekord genom att den 3 mars passera s\u00e5 n\u00e4ra som 50 km fr\u00e5n dess yta. De data som samlas in under dessa n\u00e4ra f\u00f6rbiflygningar kan bidra till att l\u00f6sa n\u00e5gra av mysterierna kring den fascinerande lilla m\u00e5nen.<\/p>\n

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

Bilder som skickats tillbaka fr\u00e5n Mars Express och andra rymdfarkoster visar att Phobos \u00e4r en sliten, potatisformad sten med en diameter p\u00e5 mindre \u00e4n 28 km. Den f\u00f6ljer en n\u00e4stan cirkul\u00e4r bana l\u00e4ngs ekvatorn, cirka 6 000 km ovanf\u00f6r planetens yta. F\u00f6r att undvika att krascha in i Mars m\u00e5ste den r\u00f6ra sig mycket snabbt runt sin bana. Varje varv tar 7 timmar och 39 minuter, s\u00e5 n\u00e5gon som st\u00e5r p\u00e5 planeten skulle se Phobos passera \u00f6ver himlen, fr\u00e5n v\u00e4st till \u00f6st, tre g\u00e5nger om dagen.<\/p>\n

De flesta forskare tror att denna lilla rymdsten \u00e4r en asteroid som kom f\u00f6r n\u00e4ra Mars och f\u00e5ngades in av planetens gravitation. Det \u00e4r dock mycket sv\u00e5rt att f\u00f6rklara hur Phobos hamnade i sin nuvarande bana. De flesta inf\u00e5ngade m\u00e5nar f\u00f6ljer mycket elliptiska (\u00e4ggformade) banor l\u00e5ngt bort fr\u00e5n sin planet. Mars Express kan kanske bidra till att l\u00f6sa detta mysterium. Genom att studera hur Phobos gravitation p\u00e5verkar rymdfarkosten och f\u00f6r\u00e4ndrar dess bana kommer forskarna att l\u00e4ra sig mer om m\u00e5nens inre. Tidigare data har tytt p\u00e5 att Phobos kan vara en por\u00f6s stenh\u00f6ga med m\u00e5nga tomma utrymmen.<\/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\/sv\/wp-json\/wp\/v2\/posts\/849","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=849"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/849\/revisions"}],"predecessor-version":[{"id":4706,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/849\/revisions\/4706"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=849"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=849"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=849"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=849"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=849"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=849"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=849"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}