{"id":522,"date":"2015-08-10T10:26:00","date_gmt":"2015-08-10T08:26:00","guid":{"rendered":"https:\/\/kids.esa.int\/here_come_the_perseids2\/"},"modified":"2026-10-08T00:29:12","modified_gmt":"2026-10-07T22:29:12","slug":"here_come_the_perseids2","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/here_come_the_perseids2\/","title":{"rendered":"Perseidit ovat tulossa!"},"content":{"rendered":"<div class=\"lede\">\n<p>T\u00e4htitaivaan tarkkailijoille on luvassa todellinen herkkupala t\u00e4ll\u00e4 viikolla, kun vuotuinen Perseidien meteorimyrsky saavuttaa huippunsa! Jos et ole koskaan ennen n\u00e4hnyt meteoria, t\u00e4m\u00e4 on siihen ihanteellinen tilaisuus. Aktiivisuuden odotetaan olevan suurimmillaan 11.\u201313. elokuuta. Pysy kaukana kirkkaista valoista, anna silmiesi sopeutua pimeyteen, makaa sel\u00e4llesi ja tuijota taivasta!<\/p>\n<\/div>\n<figure class=\"wp-block-image size-natural\" data-width=\"550\" data-credit=\"NASA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/07\/perseid_map2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2013\/07\/perseid_map2\/17878589-2-eng-GB\/perseid_map2.gif\" alt=\"\"><\/figure>\n<p>Perseidit ovat saaneet nimens\u00e4 Perseuksen t\u00e4hdist\u00f6n mukaan, josta ne n\u00e4ytt\u00e4v\u00e4t s\u00e4teilev\u00e4n ulosp\u00e4in. Ne voivat kuitenkin n\u00e4ky\u00e4 miss\u00e4 tahansa taivaalla. Paras suunta katsella on se, miss\u00e4 taivas on tummin, todenn\u00e4k\u00f6isesti suoraan yl\u00f6sp\u00e4in. Meteorisadetta voi parhaiten tarkkailla klo 23.00 tai keskiy\u00f6n j\u00e4lkeen, jolloin saatat n\u00e4hd\u00e4 jopa 100 meteoria tunnissa!<\/p>\n<p>Perseidit ovat hiekan- tai herneen kokoisia kivenpalasia, jotka Swift-Tuttle-komeetta on heitt\u00e4nyt avaruuteen kauan sitten. T\u00e4m\u00e4 komeetta hajoaa hitaasti kiert\u00e4ess\u00e4\u00e4n Aurinkoa. Vuosisatojen kuluessa sen murenevat j\u00e4\u00e4nteet ovat levinneet sen kiertoradalle muodostaen satojen miljoonien kilometrien pituisen hiukkaspaljon.<\/p>\n<p>Maan kiertorata Auringon ymp\u00e4ri vie meid\u00e4t t\u00e4m\u00e4n komeetan j\u00e4\u00e4nteiden l\u00e4pi joka vuosi elokuun puoliv\u00e4liss\u00e4. N\u00e4m\u00e4 \u2018meteoroideiksi\u2019 kutsutut hiukkaset liikkuvat 60 km sekunnissa suhteessa Maahan. Kun jokin niist\u00e4 osuu yl\u00e4ilmakeh\u00e4\u00e4n, se muodostaa valkoisen kuuman, ylikuumennetun ilman juovan. Satunnaisesti kirkkaammat niist\u00e4 s\u00e4ilyv\u00e4t n\u00e4kyviss\u00e4 useita sekunteja j\u00e4tt\u00e4en j\u00e4lkeens\u00e4 hehkuvia savu- ja kaasuj\u00e4lki\u00e4.<\/p>\n<p>Perseidit sopivat erinomaisesti digitaaliseen valokuvaukseen. Kiinnit\u00e4 kamera kolmijalkaan, mieluiten laajakulmaobjektiivilla ja korkealla ISO-asetuksella (pimeys). Pid\u00e4 suljinta auki kerrallaan 10\u201315 sekuntia (todella pime\u00e4ss\u00e4 paikassa pidemp\u00e4\u00e4n). Hieman onnea, ja saatat saada kuvattua yhden tai useamman Perseidien meteorin viuhkaavan kuvan poikki!<\/p>","protected":false},"excerpt":{"rendered":"<p>Sky watchers will be in for a treat this week, when the annual Perseid meteor shower reaches its peak! If you&#8217;ve never seen a meteor before, this is the ideal [&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\/2013\/07\/perseids_meteor_shower\/17888431-2-eng-GB\/Perseids_meteor_shower.jpg","esa_banner_description":"Perseids meteor shower","esa_banner_credit":"Ali Jarekji, Reuters","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/07\/Perseids_meteor_shower","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-522","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/522","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=522"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/522\/revisions"}],"predecessor-version":[{"id":4529,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/522\/revisions\/4529"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=522"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=522"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=522"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=522"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=522"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=522"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=522"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}