{"id":580,"date":"2005-12-09T12:29:00","date_gmt":"2005-12-09T11:29:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_solar_system_and_its_planets\/"},"modified":"2026-10-08T00:29:52","modified_gmt":"2026-10-07T22:29:52","slug":"the_solar_system_and_its_planets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/the_solar_system_and_its_planets\/","title":{"rendered":"Solsystemet och dess planeter"},"content":{"rendered":"
\n

Solsystemet best\u00e5r av solen och alla de mindre himlakroppar som kretsar kring den. F\u00f6rutom solen \u00e4r de \u00e5tta stora planeterna de st\u00f6rsta himlakropparna i solsystemet. N\u00e4rmast solen ligger fyra relativt sm\u00e5, steniga planeter \u2013 Merkurius, Venus, Jorden och Mars.<\/p>\n<\/div>\n

Bortom Mars ligger asteroidb\u00e4ltet \u2013 ett omr\u00e5de som best\u00e5r av miljontals steniga himlakroppar. Dessa \u00e4r rester fr\u00e5n planeternas bildande f\u00f6r 4,5 miljarder \u00e5r sedan.<\/p>\n

P\u00e5 andra sidan asteroidb\u00e4ltet ligger de fyra gasj\u00e4ttarna \u2013 Jupiter, Saturnus, Uranus och Neptunus. Dessa planeter \u00e4r mycket st\u00f6rre \u00e4n jorden, men v\u00e4ger v\u00e4ldigt lite i f\u00f6rh\u00e5llande till sin storlek. De best\u00e5r till st\u00f6rsta delen av v\u00e4te och helium.<\/p>\n

Fram till nyligen var den mest avl\u00e4gset bel\u00e4gna k\u00e4nda planeten en isig v\u00e4rld som hette Pluto. Pluto \u00e4r dock betydligt mindre \u00e4n jordens m\u00e5ne, och m\u00e5nga astronomer anser att den \u00e4r f\u00f6r liten f\u00f6r att kunna kallas en riktig planet.<\/p>\n

Ett himlakropp som kallas Eris, och som \u00e4r minst lika stor som Pluto, uppt\u00e4cktes mycket l\u00e5ngt fr\u00e5n Solen \u00e5r 2005. Under de senaste \u00e5ren har man uppt\u00e4ckt mer \u00e4n 1 000 isiga himlakroppar av samma typ som Eris bortom Pluto. Dessa kallas Kuiperb\u00e4ltesobjekt. \u00c5r 2006 beslutade Internationella astronomiska unionen att Pluto och Eris m\u00e5ste klassificeras som \u201cdv\u00e4rgplaneter\u201d.<\/p>\n

\u00c4nnu l\u00e4ngre bort finns kometerna i Oortmolnet. De befinner sig s\u00e5 l\u00e5ngt bort att de inte g\u00e5r att se ens med de st\u00f6rsta teleskopen. Emellan\u00e5t rubbas en av dessa kometer ur sin bana och beger sig mot solen. D\u00e5 blir den synlig p\u00e5 natthimlen.<\/p>","protected":false},"excerpt":{"rendered":"

The Solar System is made up of the Sun and all of the smaller objects that move around it. Apart from the Sun, the largest members of the Solar System […]<\/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\/2014\/08\/explore_our_universe_poster\/17899681-2-eng-GB\/Explore_our_Universe_poster.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/08\/Explore_our_Universe_poster","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-580","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/580","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=580"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/580\/revisions"}],"predecessor-version":[{"id":1723,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/580\/revisions\/1723"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=580"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=580"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=580"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=580"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=580"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=580"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=580"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}