{"id":208799,"date":"2022-06-11T15:19:00","date_gmt":"2022-06-11T12:19:00","guid":{"rendered":"https:\/\/howtogeek.inform.com.de\/?p=208799"},"modified":"2022-04-07T09:16:56","modified_gmt":"2022-04-07T06:16:56","slug":"nasa-s-hubble-teleskop-filmade-en-exploderande-stjaerna-ljusare-aen-5-miljarder-solar","status":"publish","type":"post","link":"https:\/\/howtogeek.inform.com.de\/sv\/nasa-s-hubble-teleskop-filmade-en-exploderande-stjaerna-ljusare-aen-5-miljarder-solar\/","title":{"rendered":"NASA:s Hubble-teleskop filmade en exploderande stj\u00e4rna ljusare \u00e4n 5 miljarder solar"},"content":{"rendered":"<p><a href=\"https:\/\/www.nasa.gov\/feature\/goddard\/2020\/hubble-watches-exploding-star-fade-into-oblivion\/\" target=\"_blank\" rel=\"noopener nofollow\" class=\"external external_icon\">NASA<\/a><\/p>\n<p>En l\u00e5ga som brinner dubbelt s\u00e5 stark brinner h\u00e4lften s\u00e5 l\u00e4nge. S\u00e5 n\u00e4r en avl\u00e4gsen stj\u00e4rna lyser fem miljarder g\u00e5nger starkare \u00e4n v\u00e5r sol, vet du att det inte \u00e4r l\u00e4nge till den h\u00e4r v\u00e4rlden. NASA:s Hubble-teleskop b\u00f6rjade filma en time-lapse av SN 2018gv-supernovan 2018, mindre \u00e4n ett \u00e5r innan den fl\u00f6g ner i etern.<\/p>\n<p>Supernovor \u00e4r d\u00f6ende stj\u00e4rnor som, n\u00e4r de n\u00e5r kritisk massa, blir tillr\u00e4ckligt varma f\u00f6r att ant\u00e4nda en ih\u00e5llande termonukle\u00e4r process &#8211; ungef\u00e4r som en k\u00e4rnvapenbomb eller ett punkterat litiumjonbatteri. Supernovan SN 2018gv b\u00f6rjade som en vit dv\u00e4rg och accelererade mot sin kritiska massa n\u00e4r den samlade material fr\u00e5n en medf\u00f6ljande stj\u00e4rna.<\/p>\n<div class=\"sds-iframe-wrapper fitvidsignore\" style=\"position:relative;padding-top:56.25%;max-width:100%;\"><iframe allowfullscreen style=\"position:absolute;top:0;left:0;width:100%;height:100%;\" src=\"\/\/www.youtube.com\/embed\/GQ13j55P3sE\" frameborder=\"0\"><\/iframe><\/div>\n<p>Men intressant nog slog supernovan SN 2018gv inga rekord f\u00f6r ljusstyrka. Det beror p\u00e5 att supernova av denna typ alltid toppar med samma ljusstyrka innan den faller s\u00f6nder. Astronomer kan till och med ber\u00e4kna avst\u00e5ndet mellan kosmiska kroppar genom att j\u00e4mf\u00f6ra en supernovas &quot;observerbara&quot; ljusstyrka med dess faktiska standardljusstyrka. Ett snyggt partytrick, om du fr\u00e5gar mig.<\/p>\n<p>NASA:s SN 2018gv timelapse \u00e4r tillg\u00e4nglig p\u00e5 YouTube, men den \u00e4r bara 30 sekunder l\u00e5ng. Nu n\u00e4r SN 2018gv-supernovan inte l\u00e4ngre \u00e4r&#8230; &quot;super&quot;, kan astronomer forts\u00e4tta att observera regionen f\u00f6r att studera hur supernovor \u00f6verg\u00e5r till nebulosa (som \u00e4r de dammmoln som l\u00e4mnats efter av en massiv kosmisk explosion).<\/p>\n<p>K\u00e4lla: <a href=\"https:\/\/www.nasa.gov\/feature\/goddard\/2020\/hubble-watches-exploding-star-fade-into-oblivion\/\" target=\"_blank\" rel=\"noopener nofollow\" class=\"external external_icon\">NASA<\/a><\/p>\n<p><div id=\"PostUnique_PostSource\" style=\"padding-top: 50px\">Inspelningsk\u00e4lla:  <a target=\"_blank\" rel=\"noopener nofollow\" href=\"\/\/www.reviewgeek.com\" class=\"external external_icon\">www.reviewgeek.com<\/a><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En l\u00e5ga som brinner dubbelt s\u00e5 stark brinner h\u00e4lften s\u00e5 l\u00e4nge. S\u00e5 n\u00e4r en avl\u00e4gsen stj\u00e4rna lyser fem miljarder g\u00e5nger starkare \u00e4n v\u00e5r sol, vet du att det inte \u00e4r l\u00e4nge till den h\u00e4r v\u00e4rlden. NASA:s Hubble-teleskop b\u00f6rjade filma en time-lapse av SN 2018gv-supernovan 2018, mindre \u00e4n ett \u00e5r innan den fl\u00f6g ner i etern.<\/p>\n","protected":false},"author":1,"featured_media":182384,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[],"tags":[],"class_list":["post-208799","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/posts\/208799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/comments?post=208799"}],"version-history":[{"count":0,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/posts\/208799\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/media\/182384"}],"wp:attachment":[{"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/media?parent=208799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/categories?post=208799"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/howtogeek.inform.com.de\/sv\/wp-json\/wp\/v2\/tags?post=208799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}