{"id":589,"date":"2004-11-15T13:56:00","date_gmt":"2004-11-15T12:56:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_big_bang\/"},"modified":"2026-10-08T00:29:59","modified_gmt":"2026-10-07T22:29:59","slug":"the_big_bang","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/the_big_bang\/","title":{"rendered":"Big Bang"},"content":{"rendered":"<div class=\"lede\">\n<p>De fleste astronomer mener at universet oppsto ved et \u00abBig Bang\u00bb for rundt 14 milliarder \u00e5r siden. P\u00e5 den tiden befant hele universet seg inne i en boble som var tusenvis av ganger mindre enn et knappen\u00e5lshode. Det var varmere og tettere enn noe vi kan forestille oss.<\/p>\n<\/div>\n<p>S\u00e5 eksploderte det plutselig. Universet slik vi kjenner det, ble til. Tid, rom og materie oppsto alle med Big Bang. I l\u00f8pet av en br\u00f8kdel av et sekund vokste universet fra \u00e5 v\u00e6re mindre enn et enkelt atom til \u00e5 bli st\u00f8rre enn en galakse. Og det fortsatte \u00e5 vokse i et fantastisk tempo. Det utvider seg fortsatt i dag.<\/p>\n<p>Etter hvert som universet utvidet seg og avkj\u00f8lte seg, omdannet energien seg til partikler av materie og antimaterie. Disse to motstridende partikkeltypene utslettet i stor grad hverandre. Men noe materie overlevde. Mer stabile partikler kalt protoner og n\u00f8ytroner begynte \u00e5 dannes da universet var ett sekund gammelt.<\/p>\n<p>I l\u00f8pet av de neste tre minuttene sank temperaturen til under 1 milliard grader Celsius. Det var n\u00e5 kj\u00f8lig nok til at protonene og n\u00f8ytronene kunne smelte sammen og danne hydrogen- og heliumkjerner.<\/p>\n<p>Etter 300 000 \u00e5r hadde universet avkj\u00f8lt seg til rundt 3000 grader. Atomkjernene kunne endelig fange opp elektroner og danne atomer. Universet fylte seg med skyer av hydrogen- og heliumgass.<\/p>","protected":false},"excerpt":{"rendered":"<p>Most astronomers believe the Universe began in a Big Bang about 14 billion years ago. At that time, the entire Universe was inside a bubble that was thousands of times [&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\/2014\/06\/nearby_galaxy\/17883658-2-eng-GB\/Nearby_galaxy.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\/2014\/06\/Nearby_galaxy","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-589","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\/nb\/wp-json\/wp\/v2\/posts\/589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=589"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/589\/revisions"}],"predecessor-version":[{"id":1732,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/589\/revisions\/1732"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=589"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=589"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=589"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=589"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=589"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=589"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=589"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}