{"id":923,"date":"2004-11-16T10:04:00","date_gmt":"2004-11-16T09:04:00","guid":{"rendered":"https:\/\/kids.esa.int\/exploring_asteroids\/"},"modified":"2026-10-08T00:33:49","modified_gmt":"2026-10-07T22:33:49","slug":"exploring_asteroids","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/exploring_asteroids\/","title":{"rendered":"Udforskning af asteroider"},"content":{"rendered":"
\n

De fleste asteroider er s\u00e5 sm\u00e5 og ligger s\u00e5 langt v\u00e6k, at vi kun kan se dem som sm\u00e5 lyspunkter. De opdages ved, at de bev\u00e6ger sig foran de \u2018faste stjerner\u2019 p\u00e5 nattehimlen. Vi l\u00e6rer mere om dem ved at bruge store teleskoper til at unders\u00f8ge det lys, de reflekterer.<\/p>\n<\/div>\n

Men selv Hubble-rumteleskopet kan ikke afsl\u00f8re ret meget om dem. En af de mest interessante asteroider er den metalrige Vesta. Hubbles billeder viser en temmelig rund himmelkrop med et stort nedslagskrater.<\/p>\n

Nogle asteroider, der passerer t\u00e6t forbi Jorden, er blevet unders\u00f8gt ved hj\u00e6lp af radar. Radarekkene opfanges af store radioteleskoper og bruges til at bestemme deres form og st\u00f8rrelse.<\/p>\n

En r\u00e6kke asteroider er blevet unders\u00f8gt mere indg\u00e5ende af rumfart\u00f8jer, der har bes\u00f8gt dem. Billederne viser objekter med mange kratere, hvilket vidner om, at de er blevet udsat for kollisioner gennem milliarder af \u00e5r. I 2000 blev NEAR Shoemaker det f\u00f8rste rumfart\u00f8j, der gik i kredsl\u00f8b om en asteroide. Rumfart\u00f8jet afsluttede sin mission med en historisk landing p\u00e5 Eros, en af de st\u00f8rste asteroider t\u00e6t p\u00e5 Jorden.<\/p>\n

ESA\u2019s rumfart\u00f8j Rosetta er ogs\u00e5 fl\u00f8jet forbi to asteroider i hovedb\u00e6ltet \u2013 Steins og Lutetia \u2013 p\u00e5 vej mod en komet. Med en diameter p\u00e5 omkring 130 km var Lutetia den st\u00f8rste asteroide, der hidtil er blevet bes\u00f8gt af et rumfart\u00f8j. ESA unders\u00f8ger desuden mulighederne for at aflede en asteroide, der er p\u00e5 vej mod Jorden.<\/p>","protected":false},"excerpt":{"rendered":"

Most asteroids are so small and so far away that we can only see them as tiny points of light. They are found through their movement in front of the […]<\/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\/2003\/04\/asteroids_come_in_many_shapes_and_sizes2\/17886580-2-eng-GB\/Asteroids_come_in_many_shapes_and_sizes.jpg","esa_banner_description":"Asteroids come in many shapes and sizes","esa_banner_credit":"courtesy Observatoire de Paris","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Asteroids_come_in_many_shapes_and_sizes2","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":[46,10,11],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-923","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/923","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=923"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/923\/revisions"}],"predecessor-version":[{"id":2066,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/923\/revisions\/2066"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=923"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=923"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=923"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=923"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=923"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=923"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=923"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=923"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=923"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}