{"id":1128,"date":"2004-11-15T16:10:00","date_gmt":"2004-11-15T15:10:00","guid":{"rendered":"https:\/\/kids.esa.int\/planet_earth_-_a_water_world\/"},"modified":"2026-10-08T00:36:19","modified_gmt":"2026-10-07T22:36:19","slug":"planet_earth_-_a_water_world","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/planet_earth_-_a_water_world\/","title":{"rendered":"Maapallo \u2013 vesimaailma"},"content":{"rendered":"<div class=\"lede\">\n<p>Maa ei ole samanlainen kuin mik\u00e4\u00e4n muu planeetta, jota olemme t\u00e4h\u00e4n menness\u00e4 havainneet. Se on ainoa tuntemamme planeetta, jolla on laajoja pintavesialueita ja jonka ilmakeh\u00e4ss\u00e4 on runsaasti happea. Se on my\u00f6s ainoa tunnettu planeetta, jolla on el\u00e4m\u00e4\u00e4. T\u00e4m\u00e4 tekee siit\u00e4 hyvin erityisen.<\/p>\n<\/div>\n<p>Avaruusaluksesta tai Kuusta katsottuna Maa n\u00e4ytt\u00e4\u00e4 siniselt\u00e4 planeetalta \u2013 kuin keidas avaruudessa. T\u00e4m\u00e4 johtuu siit\u00e4, ett\u00e4 noin seitsem\u00e4n kymmenesosaa sen pinnasta on merien peitossa. Kun aurinko l\u00e4mmitt\u00e4\u00e4 vett\u00e4, se muuttuu kaasuksi (jota kutsutaan vesih\u00f6yryksi). Kun t\u00e4m\u00e4 kaasu j\u00e4\u00e4htyy, se muuttuu takaisin vesipisaroiksi, jotka muodostavat pilvi\u00e4 ja sadetta.<\/p>\n<p>T\u00e4m\u00e4 veden kierto on mahdollista, koska Maa sijaitsee 150 miljoonan kilometrin p\u00e4\u00e4ss\u00e4 Auringosta, aurinkokunnan \u2018Goldilocks\u2019-vy\u00f6hykkeell\u00e4. Auringosta kolmantena planeettana Maa ei ole liian kuuma eik\u00e4 liian kylm\u00e4 merien olemassaololle. L\u00e4mp\u00f6tila on my\u00f6s juuri sopiva el\u00e4m\u00e4lle. Ja tilanne on pysynyt samana miljardeja vuosia.<\/p>","protected":false},"excerpt":{"rendered":"<p>Earth is like no other planet that we have yet observed. It is the only world we know that has large areas of surface water and a lot of oxygen [&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\/04\/earth_view_32\/17883695-2-eng-GB\/Earth_view_3.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\/2003\/04\/Earth_view_32","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-1128","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\/fi\/wp-json\/wp\/v2\/posts\/1128","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=1128"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1128\/revisions"}],"predecessor-version":[{"id":2271,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1128\/revisions\/2271"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=1128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=1128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=1128"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=1128"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=1128"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=1128"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=1128"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=1128"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=1128"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=1128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}