{"id":623,"date":"2013-10-02T11:25:00","date_gmt":"2013-10-02T09:25:00","guid":{"rendered":"https:\/\/kids.esa.int\/europe_prepares_to_map_a_billion_stars\/"},"modified":"2026-10-08T00:30:23","modified_gmt":"2026-10-07T22:30:23","slug":"europe_prepares_to_map_a_billion_stars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/europe_prepares_to_map_a_billion_stars\/","title":{"rendered":"Europa g\u00f8r sig klar til at kortl\u00e6gge en milliard stjerner"},"content":{"rendered":"<div class=\"lede\">\n<p>Den mest avancerede stjernekortl\u00e6gger, der nogensinde er bygget, vil blive opsendt fra Europas rumhavn i Fransk Guyana den 19. december. En Soyuz-raket vil sende det 2 ton tunge rumobservatorium, kendt som Gaia, 1,5 millioner km v\u00e6k fra Jorden. Derfra vil det bruge de n\u00e6ste fem \u00e5r p\u00e5 at kortl\u00e6gge omkring en milliard stjerner i vores M\u00e6lkevej.<\/p>\n<\/div>\n<p>Gaia vil sende de mest n\u00f8jagtige data tilbage, der nogensinde er indsamlet om disse stjerners positioner, bev\u00e6gelser og lysstyrke. Hver af de udvalgte stjerner vil blive observeret omkring 70 gange i l\u00f8bet af den fem\u00e5rige mission. Det svarer til gennemsnitligt 40 millioner observationer om dagen! Positionerne for de lysere objekter (som stadig er 4.000 gange svagere, end det blotte \u00f8je kan se) vil blive kortlagt med en n\u00f8jagtighed, der kan sammenlignes med at m\u00e5le bredden af et menneskeh\u00e5r fra en afstand p\u00e5 1.000 km.<\/p>\n<p>For at opn\u00e5 denne bem\u00e6rkelsesv\u00e6rdige pr\u00e6cision er Gaia udstyret med et superf\u00f8lsomt \u201c\u00f8je\u201d \u2013 det st\u00f8rste digitale kamera, der nogensinde er sendt ud i rummet. Dette vil g\u00f8re det muligt for Gaia at registrere objekter, der er en million gange svagere, end vores \u00f8jne kan se. Den er desuden udstyret med to optiske teleskoper og tre videnskabelige instrumenter samt en 10 meter bred \u201csk\u00f8rt\u201d, der fungerer som solsk\u00e6rm og genererer solenergi.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1500\" data-credit=\"ESA\/Herschel\/PACS\/SPIRE\/J.Fritz, U.Gent\/XMM-Newton\/EPIC\/W. Pietsch, MPE\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2011\/12\/Andromeda_Galaxy_in_infrared_and_X-rays2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2011\/12\/andromeda_galaxy_in_infrared_and_x-rays2\/17896053-2-eng-GB\/Andromeda_Galaxy_in_infrared_and_X-rays.jpg\" alt=\"Andromeda Galaxy in infrared and X-rays\"><figcaption>Andromeda-galaksen i infrar\u00f8dt lys og r\u00f8ntgenstr\u00e5ler<\/figcaption><\/figure>\n<p>Gaias hovedopgave bliver at udarbejde et 3D-kort over M\u00e6lkevejen. Men den forventes ogs\u00e5 at opdage hundredtusindvis af asteroider og kometer i vores solsystem, titusindvis af \u2018mislykkede\u2019 stjerner, kaldet brune dv\u00e6rge, 20.000 eksploderende stjerner, kaldet supernovaer, og hundredtusindvis af aktive galakser, kaldet kvasarer.<\/p>\n<p>Gaia vil desuden opdage mindst 7.000 planeter, der kredser om fjerne stjerner. Det vil ske ved at registrere sm\u00e5 bev\u00e6gelser i en stjernes position, n\u00e5r en n\u00e6rliggende planet ud\u00f8ver en tiltr\u00e6kningskraft p\u00e5 stjernen. Ved missionens afslutning vil den have sendt 1 petabyte (1 million gigabyte) data tilbage, hvilket er nok til at fylde 200.000 DVD'er.<\/p>","protected":false},"excerpt":{"rendered":"<p>The most powerful star mapper ever built will be launched from Europe\u2019s spaceport in French Guiana on 19 December. A Soyuz rocket will send the 2 tonne space observatory, known [&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\/2013\/10\/artist_s_impression_of_gaia\/17906940-2-eng-GB\/Artist_s_impression_of_Gaia.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\/2013\/10\/Artist_s_impression_of_Gaia","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-623","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/623","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=623"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/623\/revisions"}],"predecessor-version":[{"id":4590,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/623\/revisions\/4590"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=623"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=623"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=623"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=623"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=623"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=623"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=623"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}