{"id":931,"date":"2004-11-15T14:32:00","date_gmt":"2004-11-15T13:32:00","guid":{"rendered":"https:\/\/kids.esa.int\/dwarfs_and_supergiants\/"},"modified":"2026-10-08T00:33:54","modified_gmt":"2026-10-07T22:33:54","slug":"dwarfs_and_supergiants","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/dwarfs_and_supergiants\/","title":{"rendered":"Dv\u00e6rgstjerner og superk\u00e6mper"},"content":{"rendered":"<div class=\"lede\">\n<p>Solen er en stjerne. Ligesom de fleste stjerner er Solen en kugle af meget varm gas, der udsender enorme m\u00e6ngder lys, varme og anden str\u00e5ling. Denne str\u00e5ling opst\u00e5r ved kernereaktioner i kernen. Det svarer til, at millioner af brintbomber eksploderer hvert sekund.<\/p>\n<\/div>\n<p>Der findes mange forskellige typer stjerner. De r\u00f8de stjerner er de koldeste med overfladetemperaturer p\u00e5 omkring 2500 grader Celsius. De bl\u00e5hvide stjerner er de varmeste og n\u00e5r en gl\u00f8dende<br \/>40 000 grader. Gule stjerner som Solen ligger midt imellem med overfladetemperaturer p\u00e5 omkring 5500 grader.<\/p>\n<p>Stjerner findes i mange st\u00f8rrelser. Solen er af middelst\u00f8rrelse. Den forbr\u00e6nder sit brintbr\u00e6ndstof ret langsomt, s\u00e5 den kan forts\u00e6tte med at skinne i 10 milliarder \u00e5r. Nogle stjerner er meget st\u00f8rre og varmere end Solen. Den r\u00f8de superk\u00e6mpe Antares er 800 gange bredere end Solen. Hvis den befandt sig i midten af vores solsystem, ville den opsluge alle de indre planeter, herunder Jorden. Ligesom biler med h\u00f8jt br\u00e6ndstofforbrug bruger disse supergiganter al deres brint- og heliumbr\u00e6ndstof meget hurtigt. Efter m\u00e5ske 500 millioner \u00e5r d\u00f8r de i en supernovaeksplosion.<\/p>\n<p>De koldeste stjerner, der br\u00e6nder langsomst, er r\u00f8de dv\u00e6rge. Disse kan overleve i mere end 10 billioner (10 000 milliarder) \u00e5r. Endnu koldere og mindre er brune dv\u00e6rge. Disse er \u2018mislykkede stjerner\u2019. De er s\u00e5 kolde \u2013 nogle gange kun et par hundrede grader ved overfladen \u2013 at deres kernereaktioner aldrig kommer i gang.<\/p>","protected":false},"excerpt":{"rendered":"<p>The Sun is a star. Like most stars, the Sun is a ball of very hot gas that gives off huge amounts of light, heat and other radiation. This radiation [&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\/2000\/09\/the_tycho_supernova2\/17865860-3-eng-GB\/The_Tycho_supernova.jpg","esa_banner_description":"The Tycho supernova","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2000\/09\/The_Tycho_supernova2","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-931","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\/931","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=931"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/931\/revisions"}],"predecessor-version":[{"id":2074,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/931\/revisions\/2074"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=931"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=931"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=931"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=931"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=931"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=931"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=931"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}