{"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\/sv\/mystery_of_the_missing_matter\/","title":{"rendered":"Mysteriet med den f\u00f6rsvunna materian"},"content":{"rendered":"
\n

Visste du att det verkar saknas en del materia i universum? Du har kanske h\u00f6rt talas om m\u00f6rk materia, som \u00e4r mycket mystisk och som forskarna \u00e4nnu inte har lyckats hitta. Men \u00e4ven vanlig materia, som utg\u00f6r de saker vi \u00e4r vana vid \u2013 stj\u00e4rnor, planeter och allt vi kan se, k\u00e4nna p\u00e5 eller lukta p\u00e5 \u2013 kan vara mystisk! Genom att studera n\u00e4rliggande galaxer har vi uppt\u00e4ckt att vissa inneh\u00e5ller tre g\u00e5nger mindre materia \u00e4n vi skulle f\u00f6rv\u00e4nta oss. V\u00e5r egen galax \u2013 Vintergatan \u2013 inneh\u00e5ller mindre \u00e4n h\u00e4lften av den materia den borde ha! Var finns den saknade materian?<\/p>\n<\/div>\n

Astronomer har \u00e4gnat mycket tid och m\u00f6da \u00e5t att f\u00f6rs\u00f6ka sp\u00e5ra den saknade materian. Ist\u00e4llet f\u00f6r att befinna sig i galaxernas huvuddel, d\u00e4r de flesta stj\u00e4rnorna finns, fick en grupp forskare en id\u00e9: kanske finns denna materia i galaxernas halor. Halor \u00e4r omr\u00e5den med het gas som omger galaxerna. Det \u00e4r sv\u00e5rt att observera halor, och astronomer kan normalt sett bara kika in i dem utan att se s\u00e4rskilt l\u00e5ngt. Kan galaxernas halor vara det perfekta g\u00f6mst\u00e4llet f\u00f6r universums saknade materia?<\/p>\n

\"XMM-Newton\"
XMM-Newton<\/figcaption><\/figure>\n

En grupp astronomer har anv\u00e4nt ESA:s rymdteleskop XMM-Newton f\u00f6r att unders\u00f6ka galaxhalor djupare \u00e4n tidigare i jakten p\u00e5 materia. XMM-Newton \u00e4r ett r\u00f6ntgenteleskop, vilket inneb\u00e4r att det inte ser det vanliga ljuset som v\u00e5ra \u00f6gon kan uppfatta, utan ist\u00e4llet observerar r\u00f6ntgenstr\u00e5lning. Att studera galaxhalor med hj\u00e4lp av r\u00f6ntgenstr\u00e5lning m\u00f6jligg\u00f6r b\u00e4ttre observationer!<\/p>\n

Forskargruppen unders\u00f6kte sex spiralgalaxer i jakten p\u00e5 ledtr\u00e5dar som kunde tyda p\u00e5 att det fanns materia d\u00e4r. Efter att ha granskat data var de redo att presentera sina resultat: n\u00e4stan tre fj\u00e4rdedelar av den f\u00f6rv\u00e4ntade materian saknades fortfarande!<\/p>\n

\"Searching
S\u00f6kandet efter \u2018f\u00f6rsvunnen\u2019 materia i galaktiska halor<\/figcaption><\/figure>\n

S\u00e5 var kan den d\u00e5 finnas? Det finns n\u00e5gra teorier. Kanske finns den lagrad i n\u00e5gon form av gas som \u00e4r sv\u00e5r att observera. Den kan befinna sig i ett omr\u00e5de av rymden som vi \u00e4nnu inte har unders\u00f6kt. Eller s\u00e5 finns materian d\u00e4r i halorna, men dess r\u00f6ntgenstr\u00e5lning \u00e4r f\u00f6r svag f\u00f6r att ens XMM-Newton ska kunna uppt\u00e4cka den.<\/p>\n

Forskarna \u00e4r ivriga att forts\u00e4tta sina unders\u00f6kningar. Kanske kommer vi en dag att l\u00f6sa mysteriet med den f\u00f6rsvunna materian!<\/p>\n

Rolig fakta:<\/b> ESA:s kommande teleskop \u201dAdvanced Telescope for High-ENergy Astrophysics\u201d kommer att unders\u00f6ka galaxernas yttre delar i jakten p\u00e5 den saknade materian.<\/p>","protected":false},"excerpt":{"rendered":"

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 […]<\/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\/sv\/wp-json\/wp\/v2\/posts\/391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=391"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/391\/revisions"}],"predecessor-version":[{"id":4438,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/391\/revisions\/4438"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=391"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=391"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=391"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=391"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=391"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=391"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=391"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}