{"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\/da\/new_transport\/","title":{"rendered":"Ny transport"},"content":{"rendered":"<div class=\"lede\">\n<p>Rummet er uendeligt stort. En rejse til M\u00e5nen \u2013 vores nabo i rummet \u2013 vil tage tre dage med almindelige kemiske raketter. Rejser til Mars, asteroiderne og de ydre planeter vil vare mange m\u00e5neder eller endda \u00e5r.<\/p>\n<\/div>\n<p>Under lange rumrejser forringes astronauternes helbred og fysiske form som f\u00f8lge af uds\u00e6ttelse for str\u00e5ling og v\u00e6gtl\u00f8shed. Lange missioner kr\u00e6ver desuden mere luft, vand og mad og \u00f8ger risikoen for, at noget g\u00e5r galt. Men hvordan kan man forkorte missionerne?<\/p>\n<p>En mulighed er at g\u00f8re raketmotorerne mere effektive. ESA\u2019s ingeni\u00f8rer har allerede bygget et elektrisk fremdrivningssystem til SMART-1-missionen til M\u00e5nen. Elektriske motorer er meget mindre og lettere end almindelige motorer. Selvom de bruger langt mindre br\u00e6ndstof, er de i stand til at opn\u00e5 en h\u00f8jere udst\u00f8dningshastighed \u2013 alts\u00e5 den hastighed, hvormed gassen fra motoren skyder ud i rummet.<\/p>\n<p>Ved hj\u00e6lp af elektricitet, der genereres af sollys, der falder p\u00e5 \u2018vinger\u2019 best\u00e5ende af solceller, kan de gradvist \u00f8ge et rumfart\u00f8js hastighed, indtil det bev\u00e6ger sig mange gange hurtigere end en kemisk raket.<\/p>\n<p>Til missioner langt fra Solen vil der v\u00e6re behov for atomdrevne motorer. Med s\u00e5danne motorer vil det p\u00e5 sigt m\u00e5ske v\u00e6re muligt at flyve til Mars p\u00e5 blot et par dage.<\/p>","protected":false},"excerpt":{"rendered":"<p>Space is vast. A trip to the Moon &#8211; our neighbour in space \u2013 will take three days using normal chemical rockets. Journeys to Mars, the asteroids and the outer [&hellip;]<\/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\/da\/wp-json\/wp\/v2\/posts\/1139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=1139"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1139\/revisions"}],"predecessor-version":[{"id":2282,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1139\/revisions\/2282"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1139"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1139"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1139"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1139"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1139"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1139"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1139"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}