{"id":1140,"date":"2004-11-19T09:43:00","date_gmt":"2004-11-19T08:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/sailing_through_space\/"},"modified":"2026-10-09T11:30:53","modified_gmt":"2026-10-09T09:30:53","slug":"sailing_through_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/sailing_through_space\/","title":{"rendered":"\u00c5 seile gjennom rommet"},"content":{"rendered":"
\n

Hittil har nesten alle romferder benyttet rakettmotorer som drives av kjemisk drivstoff. Dessverre er disse ikke s\u00e6rlig effektive. For eksempel utgjorde drivstoffet over halvparten av oppskytningsvekten til ESAs romfart\u00f8y Rosetta.<\/p>\n<\/div>\n

ESA unders\u00f8ker n\u00e5 ulike m\u00e5ter \u00e5 redusere mengden drivstoff som tas med p\u00e5. En av ideene er en ionemotor, som bruker en elektrisk \u2018kanon\u2019 til \u00e5 skyte gass ut i rommet.<\/p>\n

Selv om motorens fremdrift er sv\u00e6rt svak, \u00f8ker farten gradvis. Til slutt gj\u00f8r den det mulig for et romfart\u00f8y \u00e5 bevege seg sv\u00e6rt raskt.<\/p>\n

\"Artist's
Kunstnerisk fremstilling av SMART-1<\/figcaption><\/figure>\n

SMART-1 gjennomf\u00f8rte en vellykket test av en ionemotor p\u00e5 vei til M\u00e5nen. Motoren produserte 10 ganger st\u00f8rre skyvekraft enn en vanlig rakettmotor for hvert kilo drivstoff den brukte.<\/p>\n

ESA unders\u00f8ker ogs\u00e5 romfart\u00f8y som bruker solseil i stedet for motorer. Sollys som treffer et stort, speillignende seil vil kunne drive romfart\u00f8yet mot andre planeter. Etter mange m\u00e5neder kan et slikt romfart\u00f8y n\u00e5 en hastighet p\u00e5 360 000 km\/t.<\/p>\n

En annen m\u00e5te \u00e5 spare drivstoff og vekt p\u00e5 er \u00e5 redusere farten ved \u00e5 fly gjennom en planets \u00f8vre atmosf\u00e6re. ESA planlegger \u00e5 bygge et romfart\u00f8y som skal g\u00e5 inn i bane rundt Mars ved hjelp av denne \u2018aerocapture\u2019-metoden.<\/p>","protected":false},"excerpt":{"rendered":"

Until now, nearly all space missions have used rocket motors that feed on chemical fuel. Unfortunately, these are not very efficient. For example, over half the launch weight of ESA’s […]<\/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\/close-up_view_of_smart-1_s_stationary_plasma_thruster2\/17900310-2-eng-GB\/Close-up_view_of_SMART-1_s_stationary_plasma_thruster.jpg","esa_banner_description":"Close-up view of SMART-1's stationary plasma thruster","esa_banner_credit":"ESA 2002. Illustration by Medialab.","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Close-up_view_of_SMART-1_s_stationary_plasma_thruster2","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":[10,44,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1140","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","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\/1140","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=1140"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1140\/revisions"}],"predecessor-version":[{"id":4867,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1140\/revisions\/4867"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=1140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=1140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=1140"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=1140"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=1140"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=1140"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=1140"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=1140"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=1140"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=1140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}