{"id":197,"date":"2021-12-02T12:43:24","date_gmt":"2021-12-02T11:43:24","guid":{"rendered":"https:\/\/kids.esa.int\/the_universe\/"},"modified":"2026-10-08T00:25:22","modified_gmt":"2026-10-07T22:25:22","slug":"the_universe","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/the_universe\/","title":{"rendered":"Universet"},"content":{"rendered":"
\n

Universet er alt, hvad vi kan r\u00f8re ved, f\u00f8le, opfatte, m\u00e5le eller registrere. Det omfatter levende v\u00e6sener, planeter, stjerner, galakser, st\u00f8vskyer, lys og endda tid. F\u00f8r universets tilblivelse eksisterede hverken tid, rum eller stof.<\/p>\n<\/div>\n

Universet rummer milliarder af galakser, som hver is\u00e6r indeholder millioner eller milliarder af stjerner. Rummet mellem stjernerne og galakserne er stort set tomt. Men selv p\u00e5 steder langt v\u00e6k fra stjerner og planeter findes der spredte st\u00f8vpartikler eller nogle f\u00e5 hydrogenatomer pr. kubikcentimeter. Rummet er ogs\u00e5 fyldt med str\u00e5ling (f.eks. lys og varme), magnetfelter og h\u00f8jenergipartikler (f.eks. kosmiske str\u00e5ler).<\/p>\n

Universet er utroligt stort. Det ville tage et moderne jagerfly mere end en million \u00e5r at n\u00e5 frem til den stjerne, der ligger t\u00e6ttest p\u00e5 Solen. Selv hvis det fl\u00f8j med lysets hastighed (300.000 km pr. sekund), ville det tage 100.000 \u00e5r blot at krydse vores M\u00e6lkevej.<\/p>\n

Ingen kender universets n\u00f8jagtige st\u00f8rrelse, fordi vi ikke kan se kanten \u2013 hvis der overhovedet er en. Det eneste, vi ved, er, at det synlige univers str\u00e6kker sig over mindst 93 milliarder lys\u00e5r. (Et lys\u00e5r er den afstand, lyset tilbagel\u00e6gger p\u00e5 et \u00e5r \u2013 cirka 9 billioner km.)<\/p>\n

Universet har ikke altid v\u00e6ret lige stort. Forskere mener, at det begyndte med et Big Bang, der fandt sted for n\u00e6sten 14 milliarder \u00e5r siden. Siden da har universet udvidet sig udad med meget h\u00f8j hastighed. S\u00e5 det omr\u00e5de af rummet, vi ser i dag, er milliarder af gange st\u00f8rre, end det var, da universet var meget ungt. Galakserne bev\u00e6ger sig ogs\u00e5 l\u00e6ngere v\u00e6k fra hinanden, efterh\u00e5nden som afstanden mellem dem udvider sig.<\/p>","protected":false},"excerpt":{"rendered":"

The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. Before the birth of the […]<\/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\/2010\/06\/the_massive_compact_star_cluster_in_ngc_3603_and_its_surroundings2\/18245403-2-eng-GB\/The_massive_compact_star_cluster_in_NGC_3603_and_its_surroundings.jpg","esa_banner_description":"","esa_banner_credit":"NASA\/ESA\/Hubble Heritage (STScI\/AURA)-ESA\/Hubble Collaboration","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/06\/The_massive_compact_star_cluster_in_NGC_3603_and_its_surroundings2","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":[10,11,19],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-197","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-story-of-the-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/197","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=197"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/197\/revisions"}],"predecessor-version":[{"id":1340,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/197\/revisions\/1340"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=197"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=197"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=197"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=197"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=197"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=197"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=197"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}