{"id":823,"date":"2004-12-09T15:52:00","date_gmt":"2004-12-09T14:52:00","guid":{"rendered":"https:\/\/kids.esa.int\/space_velocity\/"},"modified":"2026-10-08T00:32:41","modified_gmt":"2026-10-07T22:32:41","slug":"space_velocity","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/space_velocity\/","title":{"rendered":"Rymdhastighet"},"content":{"rendered":"
\n

F\u00f6rem\u00e5l som kretsar kring en planet kallas satelliter. Varje fullst\u00e4ndig omloppsbana som en satellit g\u00f6r runt planeten kallas en omloppsbana.<\/p>\n<\/div>\n

V\u00e5r jord har en naturlig satellit \u2013 m\u00e5nen. Sedan oktober 1957 har dock m\u00e5nga tusen konstgjorda (av m\u00e4nniskan skapade) satelliter placerats i omloppsbanor runt jorden.<\/p>\n

F\u00f6r att h\u00e5lla sig i omloppsbana m\u00e5ste en satellit r\u00f6ra sig med mycket h\u00f6g hastighet, vilken beror p\u00e5 h\u00f6jden. F\u00f6r en cirkul\u00e4r omloppsbana p\u00e5 300 km h\u00f6jd \u00f6ver jordytan kr\u00e4vs d\u00e4rf\u00f6r vanligtvis en hastighet p\u00e5 7,8 km\/s (28 000 km\/h). Vid denna hastighet kommer satelliten att fullborda ett varv runt jorden p\u00e5 90 minuter.<\/p>\n

Satelliterna m\u00e5ste r\u00f6ra sig s\u00e5 snabbt f\u00f6r att kompensera f\u00f6r jordens gravitation. Det kan j\u00e4mf\u00f6ras med n\u00e4r man kastar en cricketboll eller en baseboll. Ju h\u00e5rdare bollen kastas, desto l\u00e4ngre flyger den innan den landar p\u00e5 marken.<\/p>\n

Om en spelare kunde kasta bollen tillr\u00e4ckligt h\u00e5rt f\u00f6r att den skulle uppn\u00e5 den n\u00f6dv\u00e4ndiga hastigheten, skulle bollen g\u00e5 in i omloppsbana. Den skulle aldrig falla tillbaka till jorden. Kasta den \u00e4nnu h\u00e5rdare, s\u00e5 att den n\u00e5r en hastighet p\u00e5 11,2 km\/s (40 300 km\/h) \u2013 kallad \u2018flykthastighet\u2019 \u2013 och bollen kommer att l\u00e4mna jorden helt och h\u00e5llet. Den kommer d\u00e5 att bli en \u2018satellit\u2019 till solen.<\/p>","protected":false},"excerpt":{"rendered":"

Objects that travel around a planet are called satellites. Each complete journey a satellite makes around the planet is called an orbit. Our Earth has one natural satellite \u2013 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\/2004\/12\/newton_s_cannon2\/17886950-2-eng-GB\/Newton_s_cannon.gif","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\/Newton_s_cannon2","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-823","post","type-post","status-publish","format-standard","hentry","category-learn","category-mission-control","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/823","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=823"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/823\/revisions"}],"predecessor-version":[{"id":1966,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/823\/revisions\/1966"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=823"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=823"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=823"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=823"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=823"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=823"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=823"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}