{"id":194,"date":"2021-12-02T12:44:57","date_gmt":"2021-12-02T11:44:57","guid":{"rendered":"https:\/\/kids.esa.int\/meteors2\/"},"modified":"2026-10-08T00:25:20","modified_gmt":"2026-10-07T22:25:20","slug":"meteors2","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/meteors2\/","title":{"rendered":"Meteorer"},"content":{"rendered":"
\n

Solsystemet \u00e4r fullt av material som blivit kvar efter planeternas bildande. Sm\u00e5 stenbitar som f\u00e4rdas genom rymden kallas meteoroider. Om de tr\u00e4nger in i en planets atmosf\u00e4r och brinner upp, ses de d\u00e5 som meteorer. Ibland \u00f6verlever st\u00f6rre stenbitar tillr\u00e4ckligt l\u00e4nge f\u00f6r att krascha in i en planets yta. Rymdstenar p\u00e5 jordens yta kallas meteoriter.<\/p>\n<\/div>\n

Meteorer (ofta kallade \u201cstj\u00e4rnfall\u201d) \u00e4r ett mycket vanligt fenomen. Den som blickar upp mot en klar natthimmel kommer f\u00f6rr eller senare att se dessa korta ljussp\u00e5r. Meteorer uppst\u00e5r n\u00e4r meteoriter tr\u00e4nger in i den \u00f6vre atmosf\u00e4ren med hastigheter p\u00e5 omkring 15 km\/s! Meteorsp\u00e5ren varar vanligtvis mindre \u00e4n en sekund. Friktionen mot den tunna luften p\u00e5 en h\u00f6jd av cirka 100 km g\u00f6r att meteoriterna lyser upp n\u00e4r de v\u00e4rms upp och sedan f\u00f6rst\u00f6rs.<\/p>\n

Meteorer kan ses n\u00e4r som helst, men den b\u00e4sta tiden att h\u00e5lla utkik efter dem \u00e4r under periodiska meteorregn. S\u00e5dana meteorregn intr\u00e4ffar ungef\u00e4r vid samma tidpunkt varje \u00e5r, n\u00e4r jorden passerar genom ett dammsp\u00e5r som l\u00e4mnats kvar av en f\u00f6rbipasserande komet.<\/p>\n

Det finns ungef\u00e4r 20 st\u00f6rre meteorregn, \u00e4ven om endast ett f\u00e5tal av dem ger upphov till s\u00e5 m\u00e5nga som 50 meteorer per minut. Ibland fylls himlen av stj\u00e4rnfall. De mest k\u00e4nda \u201cmeteorstormarna\u201d \u00e4r kopplade till Leonid-meteorsv\u00e4rmen, som intr\u00e4ffar varje \u00e5r mellan den 14 och 20 november. Meteorsv\u00e4rmen har tidigare varit s\u00e5 aktiv att den liknade sn\u00f6fall!<\/p>\n

Vissa meteorer \u00e4r f\u00f6r svaga f\u00f6r att kunna ses, \u00e4ven p\u00e5 natten, men de kan uppt\u00e4ckas med radar. \u00c4ven andra planeter har meteorregn. P\u00e5 Mars brinner meteoriterna oftast upp i den tunna atmosf\u00e4ren och bildar meteorer. P\u00e5 m\u00e5nen finns det dock ingen luft, s\u00e5 meteoriterna sl\u00e5r ner p\u00e5 ytan och exploderar utan att brinna upp.<\/p>","protected":false},"excerpt":{"rendered":"

The Solar System is full of material left over from the formation of the planets. Small chunks of rock that travel through space are known as meteoroids. If they enter […]<\/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\/2013\/07\/meteor_shower\/17904232-2-eng-GB\/Meteor_shower.jpg","esa_banner_description":"Meteor shower","esa_banner_credit":"Night Sky Nation","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/07\/Meteor_shower","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":[46,10,11],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-194","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/194","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=194"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/194\/revisions"}],"predecessor-version":[{"id":1337,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/194\/revisions\/1337"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=194"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=194"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=194"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=194"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=194"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=194"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=194"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}