{"id":391,"date":"2018-05-07T12:06:00","date_gmt":"2018-05-07T10:06:00","guid":{"rendered":"https:\/\/kids.esa.int\/mystery_of_the_missing_matter\/"},"modified":"2026-10-08T00:27:38","modified_gmt":"2026-10-07T22:27:38","slug":"mystery_of_the_missing_matter","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/mystery_of_the_missing_matter\/","title":{"rendered":"Mysteriet om den forsvundne materie"},"content":{"rendered":"<div class=\"lede\">\n<p>Vidste du, at der tilsyneladende mangler noget stof i universet? Du har m\u00e5ske h\u00f8rt om m\u00f8rkt stof, som er meget mystisk og endnu ikke er blevet fundet af forskerne. Men ogs\u00e5 almindeligt stof, som udg\u00f8r de ting, vi er vant til \u2013 stjerner, planeter og alt det, vi kan se, r\u00f8re ved eller lugte til \u2013 kan v\u00e6re mystisk! Ved at studere n\u00e6rliggende galakser har vi fundet ud af, at nogle indeholder tre gange mindre stof, end vi ville forvente. Vores egen galakse \u2013 M\u00e6lkevejen \u2013 indeholder mindre end halvdelen af det stof, den burde! Hvor er det manglende stof?<\/p>\n<\/div>\n<p>Astronomer har brugt meget tid og kr\u00e6fter p\u00e5 at fors\u00f8ge at opspore det forsvundne stof. I stedet for at befinde sig i galaksernes hoveddel, hvor de fleste stjerner findes, fik en gruppe forskere en id\u00e9: m\u00e5ske befinder dette stof sig i galaksernes haler. Haloer er omr\u00e5der med varm gas, der omgiver galakserne. Det er sv\u00e6rt at observere haloer, og astronomer kan normalt kun kigge ind i dem uden at kunne se s\u00e6rlig langt. Kunne galaksernes haloer v\u00e6re det perfekte skjulested for universets forsvundne stof?<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"2500\" data-credit=\"ESA-C. Carreau\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/XMM-Newton\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2018\/05\/xmm-newton\/17879070-2-eng-GB\/XMM-Newton.jpg\" alt=\"XMM-Newton\"><figcaption>XMM-Newton<\/figcaption><\/figure>\n<p>Et hold af astronomer har brugt et ESA-rumteleskop ved navn XMM-Newton til at unders\u00f8ge galaksehaloer dybere end nogensinde f\u00f8r for at lede efter stof. XMM-Newton er et r\u00f8ntgenteleskop, hvilket betyder, at det ikke ser det normale lys, som vores \u00f8jne kan opfange, men i stedet observerer r\u00f8ntgenstr\u00e5ler. Unders\u00f8gelsen af galaksehaloer ved hj\u00e6lp af r\u00f8ntgenstr\u00e5ler giver mulighed for bedre observationer!<\/p>\n<p>Forskerholdet unders\u00f8gte seks spiralgalakser i jagten p\u00e5 tegn p\u00e5, at der kunne v\u00e6re stof til stede. Efter at have gennemg\u00e5et dataene var de klar til at offentligg\u00f8re deres resultater: N\u00e6sten tre fjerdedele af det forventede stof manglede stadig!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"3774\" data-credit=\"ESA\/XMM-Newton; J-T. Li (University of Michigan, USA); Sloan Digital Sky Survey (SDSS)\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Searching_galactic_haloes_for_missing_matter\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2018\/05\/searching_galactic_haloes_for_missing_matter\/17907606-2-eng-GB\/Searching_galactic_haloes_for_missing_matter.jpg\" alt=\"Searching galactic haloes for \u2018missing\u2019 matter\"><figcaption>P\u00e5 jagt efter \u2018forsvundet\u2019 stof i galaktiske haler<\/figcaption><\/figure>\n<p>S\u00e5 hvor kan det mon v\u00e6re? Der er et par teorier. M\u00e5ske er det lagret i en form for gas, som vi har sv\u00e6rt ved at observere. Det kunne befinde sig i et omr\u00e5de af rummet, som vi endnu ikke har unders\u00f8gt. Eller m\u00e5ske findes stoffet der i haloerne, men dets r\u00f8ntgenstr\u00e5ler er for svage til, at selv XMM-Newton kan registrere dem.<\/p>\n<p>Forskerne er ivrige efter at forts\u00e6tte unders\u00f8gelserne. M\u00e5ske vil vi en dag l\u00f8se mysteriet om det forsvundne stof!<\/p>\n<p><b>Sjovt faktum:<\/b> ESAs kommende teleskop, Advanced Telescope for High-ENergy Astrophysics, skal unders\u00f8ge galaksernes ydre omr\u00e5der i jagten p\u00e5 det forsvundne stof.<\/p>","protected":false},"excerpt":{"rendered":"<p>Did you know that the Universe seems to be missing some matter? You may have heard of dark matter, which is very mysterious and has yet to be found by [&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\/2018\/05\/anatomy_of_the_milky_way\/17882733-2-eng-GB\/Anatomy_of_the_Milky_Way.jpg","esa_banner_description":"Anatomy of the Milky Way","esa_banner_credit":"NASA\/JPL-Caltech; right: ESA; layout: ESA\/ATG medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Anatomy_of_the_Milky_Way","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-391","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/391","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=391"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/391\/revisions"}],"predecessor-version":[{"id":4438,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/391\/revisions\/4438"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=391"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=391"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=391"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=391"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=391"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=391"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=391"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}