{"id":836,"date":"2004-12-02T15:57:00","date_gmt":"2004-12-02T14:57:00","guid":{"rendered":"https:\/\/kids.esa.int\/how_does_a_rocket_work\/"},"modified":"2026-10-08T00:32:49","modified_gmt":"2026-10-07T22:32:49","slug":"how_does_a_rocket_work","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/how_does_a_rocket_work\/","title":{"rendered":"Hvordan fungerer en rakett?"},"content":{"rendered":"
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Har du lagt merke til hva som skjer n\u00e5r du slipper luften ut av en ballong? Luften str\u00f8mmer i \u00e9n retning, og ballongen beveger seg i motsatt retning. Raketter fungerer p\u00e5 omtrent samme m\u00e5te. Eksosgasser som str\u00f8mmer ut av motordysen med h\u00f8y hastighet, skyver raketten fremover.<\/p>\n<\/div>\n

De fleste moderne b\u00e6reraketter, som for eksempel den europeiske Ariane 5, er sv\u00e6rt kompliserte og veier flere hundre tonn ved oppskyting. Det meste av denne vekten best\u00e5r av drivstoff, som flytende hydrogen og flytende oksygen.<\/p>\n

Raketter trenger sv\u00e6rt mye drivstoff for \u00e5 overvinne jordens tyngdekraft. F\u00f8rst n\u00e5r de n\u00e5r en hastighet p\u00e5 28 000 km\/t, beveger de seg raskt nok til \u00e5 g\u00e5 inn i bane rundt jorden.<\/p>\n

De fleste raketter best\u00e5r av to eller tre trinn. N\u00e5r et trinn har brukt opp alt drivstoffet sitt, skilles det fra resten av raketten for \u00e5 kvitte seg med d\u00f8dvekten. Deretter faller det ned (vanligvis i havet og langt unna befolkede omr\u00e5der) eller brenner opp i atmosf\u00e6ren.<\/p>\n

Store b\u00e6reraketter f\u00e5r ofte et ekstra l\u00f8ft fra raketter som er festet til f\u00f8rste trinn. Disse kan bruke fast eller flytende drivstoff. Ogs\u00e5 disse kastes vanligvis bort.<\/p>","protected":false},"excerpt":{"rendered":"

Have you noticed what happens if you let the air out of a balloon? The air goes one way and the balloon moves in the opposite direction. Rockets work in […]<\/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\/12\/balloons2\/17894905-2-eng-GB\/balloons.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/balloons2","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":[10,41,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-836","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=836"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/836\/revisions"}],"predecessor-version":[{"id":1979,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/836\/revisions\/1979"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=836"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=836"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=836"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=836"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=836"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=836"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=836"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}