{"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\/sv\/new_transport\/","title":{"rendered":"Ny transport"},"content":{"rendered":"
\n

Rymden \u00e4r o\u00e4ndligt stor. En resa till M\u00e5nen \u2013 v\u00e5r granne i rymden \u2013 tar tre dagar med vanliga kemiska raketer. Resor till Mars, asteroiderna och de yttre planeterna skulle ta m\u00e5nga m\u00e5nader eller till och med \u00e5r.<\/p>\n<\/div>\n

Under l\u00e5nga rymdf\u00e4rder f\u00f6rs\u00e4mras astronauternas h\u00e4lsa och kondition p\u00e5 grund av exponering f\u00f6r str\u00e5lning och tyngdl\u00f6shet. L\u00e5nga uppdrag kr\u00e4ver dessutom mer luft, vatten och mat, och \u00f6kar risken f\u00f6r att n\u00e5got ska g\u00e5 fel. Men hur kan man f\u00f6rkorta uppdragen?<\/p>\n

Ett s\u00e4tt \u00e4r att g\u00f6ra raketmotorerna mer effektiva. ESA:s ingenj\u00f6rer har redan konstruerat ett elektriskt framdrivningssystem f\u00f6r SMART-1-uppdraget till m\u00e5nen. Elmotorer \u00e4r mycket mindre och l\u00e4ttare \u00e4n vanliga motorer. \u00c4ven om de f\u00f6rbrukar betydligt mindre br\u00e4nsle kan de alstra en h\u00f6gre utbl\u00e5sningshastighet \u2013 det vill s\u00e4ga den hastighet med vilken gasen fr\u00e5n motorn skjuts ut i rymden.<\/p>\n

Genom att utnyttja den elektricitet som alstras n\u00e4r solljuset tr\u00e4ffar \u2018vingar\u2019 av solceller kan de gradvis \u00f6ka rymdfarkostens hastighet tills den f\u00e4rdas m\u00e5nga g\u00e5nger snabbare \u00e4n en kemisk raket.<\/p>\n

F\u00f6r rymduppdrag l\u00e5ngt fr\u00e5n solen kommer det att kr\u00e4vas k\u00e4rnkraftsmotorer. Med hj\u00e4lp av s\u00e5dana motorer kan det s\u00e5 sm\u00e5ningom bli m\u00f6jligt att flyga till Mars p\u00e5 bara n\u00e5gra dagar.<\/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\/sv\/wp-json\/wp\/v2\/posts\/1139","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=1139"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1139\/revisions"}],"predecessor-version":[{"id":2282,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1139\/revisions\/2282"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=1139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=1139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=1139"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=1139"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=1139"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=1139"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=1139"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=1139"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=1139"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=1139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}