{"id":906,"date":"2004-11-19T09:13:00","date_gmt":"2004-11-19T08:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/gravity_and_weightlessness\/"},"modified":"2026-10-08T00:33:36","modified_gmt":"2026-10-07T22:33:36","slug":"gravity_and_weightlessness","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/gravity_and_weightlessness\/","title":{"rendered":"Tyngdekraft og vektl\u00f8shet"},"content":{"rendered":"
\n

I hverdagen gj\u00f8r vi ting som \u00e5 sitte, g\u00e5, plukke opp ting fra gulvet og ligge i sengen. Ingen av disse aktivitetene er mulige i bane rundt jorden.<\/p>\n<\/div>\n

N\u00e5r et romfart\u00f8y kommer i bane rundt jorden, virker alt inne i det som om det er vektl\u00f8st. Alt (eller alle) som ikke er festet, vil sveve.<\/p>\n

Astronautene merker f\u00f8rst virkningen av vektl\u00f8sheten n\u00e5r rakettmotorene sl\u00e5s av. Umiddelbart begynner de \u00e5 sveve, og holdes kun p\u00e5 plass av sikkerhetsbeltene. Vektl\u00f8sheten gj\u00f8r at astronautene kan virke ekstremt sterke. De kan l\u00f8fte gjenstander som ville v\u00e6rt altfor tunge \u00e5 flytte p\u00e5 jorden. Men det finnes ogs\u00e5 noen ulemper.<\/p>\n

Uten tyngdekraften begynner blod og andre kroppsv\u00e6sker \u00e5 str\u00f8mme opp mot hodet. Dette kan f\u00f8re til en f\u00f8lelse av trykk i hodet og hodepine. Uten tyngdekraften \u00e5 kjempe mot kan bein og muskler bli svake. For \u00e5 holde seg i form m\u00e5 de trene flere timer hver dag. Dette gj\u00f8r at de kommer seg raskere n\u00e5r de kommer tilbake til Jorden.<\/p>\n

I et romferge eller p\u00e5 en romstasjon finnes det verken opp eller ned. Det er ingen forskjell mellom gulv og tak. Dette kan f\u00f8re til at astronautene blir kvalme inntil de blir vant til denne merkelige situasjonen.<\/p>","protected":false},"excerpt":{"rendered":"

Our everyday lives involve such activities as sitting, walking, picking up things from the ground and lying in bed. None of these activities are possible in orbit. Once a spacecraft […]<\/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\/03\/parabolic_flight_picture-72\/17902825-2-eng-GB\/Parabolic_Flight_picture-7.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\/2003\/03\/Parabolic_Flight_picture-72","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":[10,13,63],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-906","post","type-post","status-publish","format-standard","hentry","category-learn","category-life-in-space","category-living-in-space","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/906","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=906"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/906\/revisions"}],"predecessor-version":[{"id":2049,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/906\/revisions\/2049"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=906"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=906"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=906"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=906"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=906"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=906"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=906"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}