{"id":1139,"date":"2004-11-19T09:40:00","date_gmt":"2004-11-19T08:40:00","guid":{"rendered":"https:\/\/kids.esa.int\/new_transport\/"},"modified":"2026-10-08T00:36:27","modified_gmt":"2026-10-07T22:36:27","slug":"new_transport","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/new_transport\/","title":{"rendered":"Ny transport"},"content":{"rendered":"
\n

Rommet er uendelig stort. En reise til M\u00e5nen \u2013 v\u00e5r nabo i rommet \u2013 vil ta tre dager med vanlige kjemiske raketter. Reiser til Mars, asteroider og de ytre planetene vil ta mange m\u00e5neder eller til og med \u00e5r.<\/p>\n<\/div>\n

Under lange romferder svekkes astronautenes helse og kondisjon p\u00e5 grunn av eksponering for str\u00e5ling og vektl\u00f8shet. Lange oppdrag krever ogs\u00e5 mer luft, vann og mat, og \u00f8ker risikoen for at noe skal g\u00e5 galt. Men hvordan kan oppdragene forkortes?<\/p>\n

En m\u00e5te er \u00e5 gj\u00f8re rakettmotorene mer effektive. ESA-ingeni\u00f8rer har allerede bygget et elektrisk fremdriftssystem til SMART-1-oppdraget til M\u00e5nen. Elektriske motorer er mye mindre og lettere enn vanlige motorer. Selv om de bruker mye mindre drivstoff, klarer de \u00e5 oppn\u00e5 en h\u00f8yere utl\u00f8pshastighet \u2013 alts\u00e5 hastigheten som gassen fra motoren skyter ut i rommet med.<\/p>\n

Ved \u00e5 utnytte elektrisiteten som dannes n\u00e5r sollys treffer \u2018vinger\u2019 laget av solceller, kan de gradvis \u00f8ke romfart\u00f8yets hastighet til det beveger seg mange ganger raskere enn en kjemisk rakett.<\/p>\n

For romferder langt fra Solen vil det v\u00e6re behov for atomdrevne motorer. Med slike motorer kan det etter hvert bli mulig \u00e5 fly til Mars p\u00e5 bare noen f\u00e5 dager.<\/p>","protected":false},"excerpt":{"rendered":"

Space is vast. A trip to the Moon – our neighbour in space \u2013 will take three days using normal chemical rockets. Journeys to Mars, the asteroids and the outer […]<\/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\/11\/smart-1_showing_off_ion_engine2\/17872705-2-eng-GB\/SMART-1_showing_off_ion_engine.jpg","esa_banner_description":"SMART-1 showing off ion engine","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/11\/SMART-1_showing_off_ion_engine2","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":[62,10,13],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1139","post","type-post","status-publish","format-standard","hentry","category-exploration","category-learn","category-life-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\/1139","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=1139"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1139\/revisions"}],"predecessor-version":[{"id":2282,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1139\/revisions\/2282"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=1139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=1139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=1139"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=1139"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=1139"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=1139"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=1139"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=1139"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=1139"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=1139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}