{"id":84,"date":"2004-11-15T13:27:00","date_gmt":"2004-11-15T12:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/our_nearest_star\/"},"modified":"2026-10-08T00:23:55","modified_gmt":"2026-10-07T22:23:55","slug":"our_nearest_star","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/our_nearest_star\/","title":{"rendered":"L\u00e4hin t\u00e4htemme"},"content":{"rendered":"
\n

Aurinko on l\u00e4hin t\u00e4htemme. Aurinko tarjoaa meille valoa ja l\u00e4mp\u00f6\u00e4. Se s\u00e4teilee my\u00f6s vaarallista ultraviolettis\u00e4teily\u00e4, joka aiheuttaa auringonpolttamia ja voi aiheuttaa sy\u00f6p\u00e4\u00e4. Ilman Aurinkoa ei olisi p\u00e4iv\u00e4nvaloa, ja planeettamme olisi pelkk\u00e4 pime\u00e4, j\u00e4\u00e4tynyt maailma, jossa ei olisi nestem\u00e4ist\u00e4 vett\u00e4 sis\u00e4lt\u00e4vi\u00e4 valtameri\u00e4 eik\u00e4 el\u00e4m\u00e4\u00e4.<\/p>\n<\/div>\n

T\u00e4m\u00e4n valtavan, eritt\u00e4in kuuman kaasupallon halkaisija on 1,4 miljoonaa kilometri\u00e4, mik\u00e4 vastaa 109 vierekk\u00e4in asetettua Maata. Sen massa on 2 miljoonaa biljoonaa biljoonaa kilogrammaa, eli se painaa yht\u00e4 paljon kuin 330 000 Maata. Auringon sis\u00e4\u00e4n mahtuisi noin 1 300 000 Maata!<\/p>\n

Maasta katsottuna aurinko n\u00e4ytt\u00e4\u00e4 liikkuvan taivaalla p\u00e4iv\u00e4ll\u00e4 ja katoavan y\u00f6ll\u00e4. T\u00e4m\u00e4 johtuu siit\u00e4, ett\u00e4 Maa py\u00f6rii it\u00e4\u00e4n p\u00e4in. Maa py\u00f6rii akselinsa ymp\u00e4ri, joka on kuvitteellinen viiva, joka kulkee Maan keskell\u00e4 pohjois- ja etel\u00e4navan v\u00e4liss\u00e4. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 meille t\u00e4\u00e4ll\u00e4 py\u00f6riv\u00e4ll\u00e4 Maapallolla aurinko n\u00e4ytt\u00e4\u00e4 nousevan aamulla id\u00e4st\u00e4 ja nousevan yh\u00e4 korkeammalle taivaalla kohti keskip\u00e4iv\u00e4\u00e4. Iltap\u00e4iv\u00e4ll\u00e4 aurinko n\u00e4ytt\u00e4\u00e4 sitten laskevan yh\u00e4 alemmas taivaalla ennen kuin se laskee l\u00e4nteen.<\/p>\n

Vaikka aurinko n\u00e4ytt\u00e4\u00e4 pienelt\u00e4 auringonnousun tai -laskun aikaan, se johtuu vain siit\u00e4, ett\u00e4 aurinko sijaitsee noin 150 miljoonan kilometrin p\u00e4\u00e4ss\u00e4 meist\u00e4. T\u00e4ll\u00e4 et\u00e4isyydell\u00e4 auringonvalon matka meihin kest\u00e4\u00e4 noin 8 minuuttia \u2013 vaikka se liikkuukin noin 300 000 km\/s:n nopeudella. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 n\u00e4emme auringonlaskun kahdeksan minuuttia sen j\u00e4lkeen, kun se on tosiasiassa tapahtunut!<\/p>","protected":false},"excerpt":{"rendered":"

The Sun is our nearest star. The Sun provides us with light and heat. It also gives out dangerous ultraviolet light which causes sunburn and may cause cancer. Without the […]<\/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\/2001\/06\/a_temperature_map_of_the_sun_s_corona_as_recorded_by_the_eit_instrument_on_soho2\/17865195-3-eng-GB\/A_temperature_map_of_the_Sun_s_corona_as_recorded_by_the_EIT_instrument_on_SOHO.jpg","esa_banner_description":"A temperature map of the Sun's corona as recorded by the EIT instrument on SOHO","esa_banner_credit":"EIT Consortium (ESA\/NASA)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/06\/A_temperature_map_of_the_Sun_s_corona_as_recorded_by_the_EIT_instrument_on_SOHO2","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":[10,11,35],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-the-sun","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/84","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=84"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":1227,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/84\/revisions\/1227"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=84"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=84"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=84"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=84"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=84"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=84"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=84"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}