{"id":181,"date":"2021-12-02T12:51:04","date_gmt":"2021-12-02T11:51:04","guid":{"rendered":"https:\/\/kids.esa.int\/spacecraft_astronomers_use_esa_space_telescope_to_find_missing_matter\/"},"modified":"2026-10-08T00:25:12","modified_gmt":"2026-10-07T22:25:12","slug":"spacecraft_astronomers_use_esa_space_telescope_to_find_missing_matter","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/spacecraft_astronomers_use_esa_space_telescope_to_find_missing_matter\/","title":{"rendered":"Astronomer bruger ESA\u2019s rumteleskop til at finde forsvundet stof"},"content":{"rendered":"
\n

Alt, hvad vi ser i rummet \u2013 s\u00e5som stjerner, planeter og endda mennesker \u2013 best\u00e5r af en form for stof, der kaldes baryoner. En stor del af baryonerne i universet synes imidlertid at mangle, og det har v\u00e6ret en stor udfordring at spore dem. En gruppe astronomer, der bruger et ESA-rumteleskop ved navn XMM-Newton, har v\u00e6ret med til at l\u00f8se dette kosmiske mysterium!<\/p>\n<\/div>\n

Vi ved, hvor mange baryoner der burde v\u00e6re i universet, ved at studere det, der kaldes den kosmiske mikrob\u00f8lgebaggrund \u2013 det \u00e6ldste lys, der stammer fra blot 380.000 \u00e5r efter Big Bang. Alle baryonerne ser ud til at have v\u00e6ret til stede i et par milliarder \u00e5r, men s\u00e5 forsvinder omkring halvdelen!<\/p>\n

\"Spider
Edderkoppesans<\/figcaption><\/figure>\n

Fabrizio Nicastro er en af de forskere, der fors\u00f8ger at l\u00f8se dette g\u00e5defulde problem. Han forklarer: \u201cDe forsvundne baryoner udg\u00f8r et af de st\u00f8rste mysterier inden for moderne astrofysik. Vi ved, at denne materie m\u00e5 findes derude \u2013 vi ser den i det tidlige univers \u2013 men s\u00e5 kan vi pludselig ikke l\u00e6ngere spore den. Hvor er den blevet af?\u201d<\/p>\n

Selv n\u00e5r man t\u00e6ller alle stjernerne og gassen i rummet sammen med alt det andet, astronomerne kunne finde, mangler der stadig 40% af baryonerne. De er virkelig gode til at gemme sig! Fabrizio og hans venner besluttede at bruge et specielt teleskop til at hj\u00e6lpe med deres s\u00f8gen: ESA\u2019s XMM-Newton. Dette teleskop befinder sig i rummet og observerer r\u00f8ntgenstr\u00e5ler i stedet for det almindelige lys, som vores \u00f8jne ser.<\/p>\n

De modige astronomer brugte XMM-Newton til at unders\u00f8ge en kvasar, som er en massiv galakse med et supermassivt sort hul i centrum, der tr\u00e6kker stof ind og udsender store m\u00e6ngder r\u00f8ntgenstr\u00e5ling! Ved n\u00f8je at studere dataene fandt de tegn p\u00e5 ilt, der var skjult i rummet mellem os og kvasaren. Det havde vi aldrig f\u00f8r v\u00e6ret i stand til at se! Fabrizio forklarer: \u201cDer ligger enorme forekomster af stof \u2013 herunder ilt \u2013 derude, og netop i den m\u00e6ngde, vi havde forventet, s\u00e5 nu kan vi endelig lukke hullet i universets baryonbudget.\u201d<\/p>\n

\"Detecting
P\u00e5visning af det varme til glohede intergalaktiske medium<\/figcaption><\/figure>\n

De forsvundne baryoner har gemt sig i en slags varm t\u00e5ge, der str\u00e6kker sig over hundreder af tusinder af lys\u00e5r i rummet mellem galakserne. Mysteriet er nu l\u00f8st, og nu kan astronomerne begynde at unders\u00f8ge disse baryoner for at finde ud af mere om dem!<\/p>\n

Sjovt faktum:<\/b> Selvom baryonisk stof udg\u00f8r alt, hvad vi kan se, udg\u00f8r det kun 5% af alt stof i universet! Det mystiske m\u00f8rke stof udg\u00f8r omkring 25%, og m\u00f8rk energi udg\u00f8r omkring 70%.<\/p>","protected":false},"excerpt":{"rendered":"

Everything we see in space, such as stars, planets and even people, is made from a type of matter called baryons. However, a lot of the baryons in the Universe […]<\/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\/07\/xmm-newton\/17910751-2-eng-GB\/XMM-Newton.jpg","esa_banner_description":"XMM-Newton","esa_banner_credit":"ESA-C. Carreau","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/07\/XMM-Newton","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-181","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\/181","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=181"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/181\/revisions"}],"predecessor-version":[{"id":4345,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/181\/revisions\/4345"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=181"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=181"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=181"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=181"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=181"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=181"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=181"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}