{"id":385,"date":"2018-05-24T12:21:00","date_gmt":"2018-05-24T10:21:00","guid":{"rendered":"https:\/\/kids.esa.int\/a_space_ant_fires_its_lasers\/"},"modified":"2026-10-08T00:27:34","modified_gmt":"2026-10-07T22:27:34","slug":"a_space_ant_fires_its_lasers","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/a_space_ant_fires_its_lasers\/","title":{"rendered":"En rummyre affyrer sine lasere!"},"content":{"rendered":"<div class=\"lede\">\n<p>\u201cMyrer i rummet\u201d lyder m\u00e5ske som titlen p\u00e5 en science fiction-film, men astronomerne kender til \u00e9n kosmisk myre derude \u2013 Myret\u00e5gen! Myret\u00e5gen ligner lidt et insekt, men er faktisk en k\u00e6mpe samling af gas og st\u00f8v, der befinder sig hele 8000 lys\u00e5r fra Jorden. Normalt ville man bruge et forst\u00f8rrelsesglas for at se en myre ordentligt, men for at se denne her skal man helt klart bruge et teleskop.<\/p>\n<\/div>\n<p>Astronomerne vidste allerede, at Myret\u00e5gen engang var en stjerne, m\u00e5ske lidt ligesom vores egen Sol, men at den var meget gammel og havde opbrugt sit forr\u00e5d af brintbr\u00e6ndstof. Stjernens ydre lag blev kastet af, hvilket gav anledning til den form, som Myret\u00e5gen har, og som vi ser fra Jorden, og efterlod en hvid dv\u00e6rgstjerne i dens centrum.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"4288\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Herschel\" 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\/herschel\/18248437-2-eng-GB\/Herschel.jpg\" alt=\"Herschel\"><figcaption>Herschel<\/figcaption><\/figure>\n<p>Nu har astronomer unders\u00f8gt observationer af Ant-t\u00e5gen, som er taget af ESA\u2019s Herschel-rumteleskop. Dette specielle instrument opfanger ikke den type lys, som vores \u00f8jne naturligt registrerer, men derimod en anden form for lys, der kaldes infrar\u00f8dt lys. De fandt noget, som ingen havde forventet: lasere!<\/p>\n<p>\u201cLasere i rummet\u201d lyder ogs\u00e5 som noget fra en science fiction-film, men det findes faktisk i virkeligheden! Den lasereffekt, man har fundet i Myret\u00e5gen, har et videnskabeligt navn: laseremission fra hydrogenrekombinationslinjer. Dette er meget sj\u00e6ldent og hj\u00e6lper os med at l\u00e6re mere om Myret\u00e5gens indre omr\u00e5der.<\/p>\n<p>Astronomer mener, at laseren stammer fra en gasskive t\u00e6t p\u00e5 den hvide dv\u00e6rgstjerne. Normalt ville der ikke v\u00e6re gas s\u00e5 t\u00e6t p\u00e5 en hvid dv\u00e6rg, s\u00e5 hvordan er den havnet der? En mulig forklaring er, at der er en anden stjerne i n\u00e6rheden, hvilket betyder, at den hvide dv\u00e6rg er en del af et dobbeltstjernesystem. Denne anden stjerne kunne holde gasskiven i kredsl\u00f8b om den hvide dv\u00e6rg og dermed frembringe laseren.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"8101\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Stellar_evolution\" 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\/stellar_evolution\/17877849-2-eng-GB\/Stellar_evolution.jpg\" alt=\"Stellar evolution\"><figcaption>Stjerners udvikling<\/figcaption><\/figure>\n<p>S\u00e5 nu ved vi alts\u00e5, at der virkelig er en myre i rummet, der skyder med lasere \u2013 p\u00e5 en m\u00e5de! M\u00e5ske bliver der en dag lavet en film om det\u2026<\/p>\n<p><b>Sjovt faktum:<\/b> Donald Menzel, der opdagede Myret\u00e5gen, var ogs\u00e5 den f\u00f8rste astronom, der fremsatte den hypotese, at t\u00e5ger kunne danne naturlige lasere \u2013 l\u00e6nge f\u00f8r vi vidste, at Myret\u00e5gen gjorde det, og endda f\u00f8r forskerne havde fremstillet lasere i laboratorierne. Sikke et tilf\u00e6lde!<\/p>","protected":false},"excerpt":{"rendered":"<p>&#8220;Ants in space&#8221; might sound like the name of a science fiction film, but astronomers know of one cosmic ant out there \u2013 the Ant Nebula! Looking a bit like [&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\/ant_nebula2\/17892612-2-eng-GB\/Ant_Nebula.jpg","esa_banner_description":"Ant Nebula","esa_banner_credit":"NASA, ESA and the Hubble Heritage Team (STScI\/AURA)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/05\/Ant_Nebula2","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-385","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\/385","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=385"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/385\/revisions"}],"predecessor-version":[{"id":4432,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/385\/revisions\/4432"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=385"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=385"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=385"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=385"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=385"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=385"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=385"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}