{"id":961,"date":"2004-11-15T14:04:00","date_gmt":"2004-11-15T13:04:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_milky_way\/"},"modified":"2026-10-08T00:34:15","modified_gmt":"2026-10-07T22:34:15","slug":"the_milky_way","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/the_milky_way\/","title":{"rendered":"Linnunrata"},"content":{"rendered":"<div class=\"lede\">\n<p>El\u00e4mme yhdess\u00e4 Linnunradan, suuren spiraaligalaksin, haaroista. Aurinko ja sen planeetat (mukaan lukien Maa) sijaitsevat t\u00e4ss\u00e4 galaksin rauhallisessa osassa, noin puoliv\u00e4liss\u00e4 keskustasta.<\/p>\n<\/div>\n<p>Linnunrata on muodoltaan kuin valtava py\u00f6rre, joka py\u00f6rii kerran 200 miljoonassa vuodessa. Se koostuu v\u00e4hint\u00e4\u00e4n 100 miljardista t\u00e4hdest\u00e4 sek\u00e4 p\u00f6lyst\u00e4 ja kaasusta. Se on niin suuri, ett\u00e4 valolla kest\u00e4\u00e4<br \/>100 000 vuotta kest\u00e4\u00e4 p\u00e4\u00e4st\u00e4 toiselle puolelle.<\/p>\n<p>Galaksin keskustaa on eritt\u00e4in vaikea n\u00e4hd\u00e4, koska kaasu- ja p\u00f6lypilvet peitt\u00e4v\u00e4t n\u00e4kym\u00e4n. Tutkijat uskovat, ett\u00e4 siell\u00e4 sijaitsee supermassiivinen musta aukko, joka nielaisee kaiken, mik\u00e4 kulkee liian l\u00e4helle.<\/p>\n<p>P\u00e4\u00e4spiraalin ulkopuolella on noin 200 pallomaista t\u00e4htijoukkoa. Jokainen \u2018pallomainen t\u00e4htijoukko\u2019 on hyvin vanha ja sis\u00e4lt\u00e4\u00e4 jopa miljoona t\u00e4hte\u00e4. Linnunrata kuuluu v\u00e4hint\u00e4\u00e4n 40 galaksin muodostamaan ryhm\u00e4\u00e4n. Niin sanotussa Paikallisryhm\u00e4ss\u00e4 on kaksi suurta spiraaligalaksia \u2013 Linnunrata ja Andromeda.<\/p>\n<p>Muut ovat paljon pienempi\u00e4. Niihin kuuluu kaksi galaksia, jotka n\u00e4kyv\u00e4t paljaalla silm\u00e4ll\u00e4 p\u00e4iv\u00e4ntasaajan etel\u00e4puolella sijaitsevista maista. Galaksit tunnetaan nimell\u00e4 Magellanin pilvet, portugalilaisen tutkimusmatkailijan Ferdinand Magellanin mukaan.<\/p>","protected":false},"excerpt":{"rendered":"<p>We live in one of the arms of a large spiral galaxy called the Milky Way. The Sun and its planets (including Earth) lie in this quiet part of the [&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\/2003\/05\/gro_ji655-40_a_black_hole_hurtles_across_the_plane_of_the_milky_way2\/17911787-2-eng-GB\/GRO_JI655-40_a_black_hole_hurtles_across_the_plane_of_the_Milky_Way.jpg","esa_banner_description":"GRO JI655-40, a black hole hurtles across the plane of the Milky Way","esa_banner_credit":"European Space Agency, NASA and Felix Mirabel (the French Atomic Energy Commission & the Institute for Astronomy and Space Physics\/Conicet of Argentina)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/05\/GRO_JI655-40_a_black_hole_hurtles_across_the_plane_of_the_Milky_Way2","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":[10,11,21],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-961","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-stars-and-galaxies","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=961"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/961\/revisions"}],"predecessor-version":[{"id":2104,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/961\/revisions\/2104"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=961"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=961"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=961"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=961"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=961"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=961"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=961"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}