{"id":978,"date":"2004-11-15T14:43:00","date_gmt":"2004-11-15T13:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/star_death\/"},"modified":"2026-10-08T00:34:26","modified_gmt":"2026-10-07T22:34:26","slug":"star_death","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/star_death\/","title":{"rendered":"Stjerners d\u00f8d"},"content":{"rendered":"
\n

Det tager de fleste stjerner millioner af \u00e5r at d\u00f8. N\u00e5r en stjerne som Solen har forbr\u00e6ndt al sin brint, udvider den sig og bliver til en r\u00f8d k\u00e6mpe. Den kan have en diameter p\u00e5 millioner af kilometer \u2013 stor nok til at sluge planeterne Merkur og Venus.<\/p>\n<\/div>\n

N\u00e5r stjernen har bl\u00e6st sine ydre lag ud, kollapser den og danner en meget t\u00e6t hvid dv\u00e6rg. En teskefuld materiale fra en hvid dv\u00e6rg ville veje op til 100 ton. Over milliarder af \u00e5r afk\u00f8les den hvide dv\u00e6rg og bliver usynlig.<\/p>\n

Stjerner, der vejer mere end otte gange Solens masse, slutter deres liv meget pludseligt. N\u00e5r de l\u00f8ber t\u00f8r for br\u00e6ndstof, svulmer de op til r\u00f8de superk\u00e6mper. De fors\u00f8ger at holde sig i live ved at forbr\u00e6nde andre former for br\u00e6ndstof, men det virker kun i et par millioner \u00e5r. Derefter spr\u00e6nger de sig selv i stykker i en k\u00e6mpe supernovaeksplosion.<\/p>\n

I cirka en uge lyser supernovaen st\u00e6rkere end alle de andre stjerner i sin galakse. Derefter svinder den hurtigt bort. Det eneste, der er tilbage, er et lille, t\u00e6t objekt \u2013 en neutronstjerne eller et sort hul \u2013 omgivet af en udvidende sky af meget varm gas.<\/p>\n

De grundstoffer, der dannes inde i supergiganten (s\u00e5som ilt, kulstof og jern), spredes ud i rummet. Dette stjernest\u00f8v danner med tiden andre stjerner og planeter.<\/p>","protected":false},"excerpt":{"rendered":"

Most stars take millions of years to die. When a star like the Sun has burned all of its hydrogen fuel, it expands to become a red giant. This may […]<\/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\/05\/ngc_6369_a_cosmic_ghost2\/17884213-2-eng-GB\/NGC_6369_a_cosmic_ghost.jpg","esa_banner_description":"NGC 6369, a cosmic ghost","esa_banner_credit":"NASA and The Hubble Heritage Team (STScI\/AURA)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/05\/NGC_6369_a_cosmic_ghost2","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":[10,11,21],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-978","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-stars-and-galaxies","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/978","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=978"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/978\/revisions"}],"predecessor-version":[{"id":2121,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/978\/revisions\/2121"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=978"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=978"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=978"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=978"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=978"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=978"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=978"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}