{"id":216,"date":"2020-04-14T09:27:15","date_gmt":"2020-04-14T07:27:15","guid":{"rendered":"https:\/\/kids.esa.int\/what_is_an_exoplanet\/"},"modified":"2026-10-08T00:25:37","modified_gmt":"2026-10-07T22:25:37","slug":"what_is_an_exoplanet","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/what_is_an_exoplanet\/","title":{"rendered":"Mik\u00e4 on eksoplaneetta?"},"content":{"rendered":"<div class=\"lede\">\n<p>Se\u00a0<a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Planets_and_moons\/The_Solar_System_and_its_planets\" target=\"_blank\" rel=\"noopener\">Aurinkokunta<\/a>\u00a0sis\u00e4lt\u00e4\u00e4 kahdeksan planeettaa, jotka kiert\u00e4v\u00e4t paikallista t\u00e4htemme ymp\u00e4ri,\u00a0<a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/The_Sun\/Our_nearest_star\" target=\"_blank\" rel=\"noopener\">aurinko<\/a>. Mutta tiesitk\u00f6, ett\u00e4 avaruudessa on viel\u00e4 paljon, paljon enemm\u00e4n planeettoja, jotka kiert\u00e4v\u00e4t\u00a0<a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Stars_and_galaxies\/Stars\" target=\"_blank\" rel=\"noopener\">t\u00e4hdet<\/a>\u00a0joita n\u00e4emme y\u00f6ll\u00e4? Niit\u00e4 kutsutaan aurinkokunnan ulkopuolisiksi planeetoiksi, lyhyemmin eksoplaneetoiksi.<\/p>\n<p>Exoplaneettojen l\u00f6yt\u00e4minen on eritt\u00e4in vaikeaa. Ne ovat niin kaukana, ettemme voi yksinkertaisesti katsoa niit\u00e4 tavallisella kaukoputkella. Ne ovat my\u00f6s hyvin pieni\u00e4 ja himmeit\u00e4 verrattuna t\u00e4htiin, joiden kiertoradalla ne liikkuvat. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 exoplaneettoja etsivien t\u00e4htitieteilij\u00f6iden on k\u00e4ytett\u00e4v\u00e4 kekseli\u00e4it\u00e4 menetelmi\u00e4!<\/p>\n<\/div>\n<h2>Katso <\/h2>\n<p>Tutustutaanpa tarkemmin eksoplaneettoihin ja niiden l\u00f6yt\u00e4misess\u00e4 k\u00e4ytett\u00e4viin menetelmiin:<\/p>\n<figure class=\"wp-block-embed is-type-video\"><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/WOD1hT0fhyw\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/figure>\n<h2>Tietokilpailu<\/h2>\n<figure class=\"wp-block-embed is-type-video\"><iframe src=\"https:\/\/paxigames.esa.int\/Games\/Trivia\/trivia.html?lan=en&#038;topic=8\" height=\"900\" width=\"500\" scrolling=\"no \"allowfullscreen=\"true\" webkitallowfullscreen=\"true\" mozallowfullscreen=\"true\" ><\/iframe><\/figure>\n<h2>Tee <\/h2>\n<p>Luo\u00a0<a href=\"http:\/\/www.esa.int\/kids\/en\/things_to_do\/Build_your_own\/Build_your_own_Cheops_spacecraft\" target=\"_blank\" rel=\"noopener\">Cheops-malli<\/a><\/p>\n<p>Luo\u00a0<a href=\"http:\/\/www.esa.int\/kids\/en\/things_to_do\/Build_your_own\/Build_your_own_Gaia_spacecraft\" target=\"_blank\" rel=\"noopener\">Gaia-malli<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>The\u00a0Solar System\u00a0contains eight planets orbiting our local star,\u00a0the Sun. But did you know that there are many, many more planets out there in space, orbiting the\u00a0stars\u00a0we see at night? These [&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\/2019\/12\/paxi_explores_exoplanets\/21515859-1-eng-GB\/Paxi_explores_exoplanets.gif","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2019\/12\/Paxi_explores_exoplanets","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":[10,36],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-216","post","type-post","status-publish","format-standard","hentry","category-learn","category-lessons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/216","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=216"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/216\/revisions"}],"predecessor-version":[{"id":1359,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/216\/revisions\/1359"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=216"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=216"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=216"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=216"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=216"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=216"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=216"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}