{"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\/da\/neptune\/","title":{"rendered":"Neptun"},"content":{"rendered":"
\n

Neptun blev opdaget i 1846 af Johann Galle, en astronom ved Berlin-observatoriet. Galle vidste, hvor han skulle lede, takket v\u00e6re beregninger foretaget af den franske matematiker Urbain Le Verrier. B\u00e5de Le Verrier og John Adams i England havde indset, at en usynlig planet ud\u00f8vede en tiltr\u00e6kningskraft p\u00e5 Uranus, hvilket fik den til at s\u00e6nke eller \u00f8ge sin hastighed.<\/p>\n<\/div>\n

Neptun viste sig at v\u00e6re n\u00e6sten en identisk tvilling til Uranus. Den er 57 gange st\u00f8rre end Jorden, men roterer ret hurtigt \u2013 en dag varer kun 16 timer og 7 minutter. Dens gennemsnitlige afstand til Solen er ca. 4.500 millioner km, og et \u00e5r p\u00e5 Neptun varer n\u00e6sten 165 jord\u00e5r.<\/p>\n

Ligesom Uranus har den en atmosf\u00e6re best\u00e5ende af brint, helium og metan. Dens indre best\u00e5r af is, muligvis med en stenagtig kerne. Selvom atmosf\u00e6ren er meget kold (-220 grader C), er der p\u00e5 den bl\u00e5 planet nogle meget kraftige vinde og voldsomme storme. Voyager 2 fotograferede en k\u00e6mpe plet p\u00e5 st\u00f8rrelse med Jorden.<\/p>\n

Neptun har mindst fem m\u00f8rke, smalle ringe (opkaldt efter Galle, Le Verrier, Adams og andre, der bidrog til opdagelsen af planeten).<\/p>\n

Den har 13 kendte m\u00e5ner. Den langt st\u00f8rste er Triton, en isverden, der er st\u00f8rre end Pluto. Triton er meget kold, s\u00e5 dens tynde atmosf\u00e6re er frosset fast til overfladen. Den har dog mange aktive isvulkaner, der spr\u00f8jter skyer af gas og st\u00f8v ud. Triton er ogs\u00e5 us\u00e6dvanlig, fordi den bev\u00e6ger sig \u201cden forkerte vej\u201d (\u00f8st mod vest) rundt om Neptun. Den ser ud til at v\u00e6re blevet indfanget af Neptuns tyngdekraft for l\u00e6nge siden.<\/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\/da\/wp-json\/wp\/v2\/posts\/1106","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=1106"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1106\/revisions"}],"predecessor-version":[{"id":2249,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1106\/revisions\/2249"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1106"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1106"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1106"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1106"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1106"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1106"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1106"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}