{"id":1106,"date":"2006-01-20T13:10:00","date_gmt":"2006-01-20T12:10:00","guid":{"rendered":"https:\/\/kids.esa.int\/neptune\/"},"modified":"2026-10-08T00:36:04","modified_gmt":"2026-10-07T22:36:04","slug":"neptune","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/neptune\/","title":{"rendered":"Neptunus"},"content":{"rendered":"
\n

Neptunus uppt\u00e4cktes 1846 av Johann Galle, en astronom vid Berlins observatorium. Galle visste var han skulle leta tack vare ber\u00e4kningar gjorda av den franske matematikern Urbain Le Verrier. B\u00e5de Le Verrier och John Adams i England hade insett att en osynlig planet p\u00e5verkade Uranus och fick den att sakta ner eller \u00f6ka farten.<\/p>\n<\/div>\n

Neptunus visade sig vara n\u00e4stan en identisk tvilling till Uranus. Den \u00e4r 57 g\u00e5nger st\u00f6rre \u00e4n jorden, men roterar ganska snabbt \u2013 en dag varar bara 16 timmar och 7 minuter. Dess genomsnittliga avst\u00e5nd fr\u00e5n solen \u00e4r cirka 4 500 miljoner km, och ett \u00e5r p\u00e5 Neptunus varar i n\u00e4stan 165 jord\u00e5r.<\/p>\n

Precis som Uranus har den en atmosf\u00e4r best\u00e5ende av v\u00e4te, helium och metan. Dess inre best\u00e5r av is, med en m\u00f6jlig stenig k\u00e4rna. Trots att atmosf\u00e4ren \u00e4r mycket kall (-220 grader C) r\u00e5der det mycket starka vindar och v\u00e5ldsamma stormar p\u00e5 den bl\u00e5 planeten. Voyager 2 fotograferade en enorm fl\u00e4ck som var lika stor som jorden.<\/p>\n

Neptunus har minst fem m\u00f6rka, smala ringar (uppkallade efter Galle, Le Verrier, Adams och andra som bidrog till uppt\u00e4ckten av planeten).<\/p>\n

Den har 13 k\u00e4nda m\u00e5nar. Den \u00f6verl\u00e4gset st\u00f6rsta \u00e4r Triton, en isig v\u00e4rld som \u00e4r st\u00f6rre \u00e4n Pluto. Triton \u00e4r mycket kall, s\u00e5 dess tunna atmosf\u00e4r har frusit fast p\u00e5 ytan. D\u00e4remot finns det m\u00e5nga aktiva isvulkaner som sprutar ut plymer av gas och stoft. Triton \u00e4r ocks\u00e5 ovanlig eftersom den r\u00f6r sig \u201c\u00e5t fel h\u00e5ll\u201d (fr\u00e5n \u00f6st till v\u00e4st) runt Neptunus. Den verkar ha f\u00e5ngats in av Neptunus gravitation f\u00f6r l\u00e4nge sedan.<\/p>","protected":false},"excerpt":{"rendered":"

Neptune was discovered in 1846 by Johann Galle, an astronomer at the Berlin Observatory. Galle knew where to look because of calculations by French mathematician Urbain Le Verrier. Both Le […]<\/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\/2000\/12\/neptune2\/17866082-3-eng-GB\/Neptune.jpg","esa_banner_description":"Neptune","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2000\/12\/Neptune2","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":[10,11,12],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1106","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1106","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=1106"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1106\/revisions"}],"predecessor-version":[{"id":2249,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1106\/revisions\/2249"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=1106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=1106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=1106"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=1106"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=1106"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=1106"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=1106"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=1106"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=1106"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=1106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}