{"id":791,"date":"2011-07-12T07:46:00","date_gmt":"2011-07-12T05:46:00","guid":{"rendered":"https:\/\/kids.esa.int\/super-sensitive_space_camera_takes_shape\/"},"modified":"2026-10-08T00:32:18","modified_gmt":"2026-10-07T22:32:18","slug":"super-sensitive_space_camera_takes_shape","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/super-sensitive_space_camera_takes_shape\/","title":{"rendered":"Eritt\u00e4in herkk\u00e4 avaruuskamera alkaa muotoutua"},"content":{"rendered":"<div class=\"lede\">\n<p>Avaruuslennolle koskaan rakennettu suurin digitaalikamera on \u00e4skett\u00e4in valmistunut monien viikkojen kovan ty\u00f6n j\u00e4lkeen. 106 erillisest\u00e4 elektronisesta ilmaisimesta koostuva \u201cmiljardin pikselin matriisi\u201d toimii ESA:n galaksikartoitusohjelman Gaian eritt\u00e4in herk\u00e4n\u00e4 \u201csilm\u00e4n\u00e4\u201d.<\/p>\n<\/div>\n<p>Vaikka paljaalla silm\u00e4ll\u00e4 voi n\u00e4hd\u00e4 useita tuhansia t\u00e4hti\u00e4 kirkkaana y\u00f6n\u00e4, Gaia tutkii miljardia t\u00e4hte\u00e4 omassa Linnunradassamme. Vuonna 2013 alkavan viisivuotisen teht\u00e4v\u00e4ns\u00e4 aikana se l\u00e4hett\u00e4\u00e4 takaisin t\u00e4h\u00e4n menness\u00e4 parhaat tiedot n\u00e4iden t\u00e4htien sijainnista, liikkeist\u00e4 ja kirkkaudesta.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1024\" data-credit=\"Astrium\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2011\/07\/Gaia_camera_array2\" 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\/2011\/07\/gaia_camera_array2\/17901013-2-eng-GB\/Gaia_camera_array.jpg\" alt=\"Gaia camera array\"><figcaption>Gaia-kameraj\u00e4rjestelm\u00e4<\/figcaption><\/figure>\n<p>Jotta Gaia pystyisi havaitsemaan t\u00e4hti\u00e4, jotka ovat jopa miljoona kertaa himme\u00e4mpi\u00e4 kuin mit\u00e4 silm\u00e4 pystyy n\u00e4kem\u00e4\u00e4n, se on varustettu joukolla CCD-kennoja (charge-coupled devices), jotka ovat kehittyneempi\u00e4 versioita tavallisissa digitaalikameroissa k\u00e4ytett\u00e4vist\u00e4 piireist\u00e4. N\u00e4m\u00e4 Isossa-Britanniassa kehitetyt suorakulmaiset ilmaisimet ovat hieman luottokorttia pienempi\u00e4 \u2013 kukin mitoiltaan 4,7 x 6 cm \u2013 mutta ohuempia kuin ihokarva!<\/p>\n<p>0,5 x 1,0 metrin kokoinen mosaiikki koottiin Gaian p\u00e4\u00e4urakoitsijan, Astrium Francen, Toulousen toimipisteess\u00e4. Teknikot sovittivat jokaisen CCD-kennon huolellisesti paikalleen j\u00e4tt\u00e4en niiden v\u00e4liin vain 1 mm:n raon. Ty\u00f6skennelless\u00e4\u00e4n kahdessa vuorossa tiukkojen puhdastilaolosuhteiden vallitessa he asensivat keskim\u00e4\u00e4rin nelj\u00e4 CCD-kennoa p\u00e4iv\u00e4ss\u00e4 ja saivat ty\u00f6ns\u00e4 lopulta valmiiksi 1. kes\u00e4kuuta.<\/p>\n<p>Valmis anturij\u00e4rjestelm\u00e4 muistuttaa pient\u00e4 laatoitettua aluetta, joka on j\u00e4rjestetty seitsem\u00e4\u00e4n riviin. Kiertoradalla anturien l\u00e4mp\u00f6tila pidet\u00e4\u00e4n \u2013110 \u00baC:ssa niiden herkkyyden parantamiseksi. Gaia toimii 1,5 miljoonan kilometrin p\u00e4\u00e4ss\u00e4, Maan pime\u00e4ll\u00e4 puolella. Maapallon py\u00f6riess\u00e4 Gaiassa olevat kaksi teleskooppia skannaavat taivasta ja tutkivat jokaista t\u00e4hte\u00e4 yksityiskohtaisesti, kun se liikkuu niiden n\u00e4k\u00f6kent\u00e4n l\u00e4pi.<\/p>","protected":false},"excerpt":{"rendered":"<p>The largest digital camera ever built for a space mission has recently been completed after many weeks of hard work. Made up of 106 separate electronic detectors, the resulting \u201cbillion-pixel [&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\/2010\/12\/gaia2\/17901642-2-eng-GB\/Gaia.jpg","esa_banner_description":"Gaia","esa_banner_credit":"ESA, image by C.Carreau","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/12\/Gaia2","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":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-791","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-stars-and-galaxies"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/791","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=791"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/791\/revisions"}],"predecessor-version":[{"id":4686,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/791\/revisions\/4686"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=791"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=791"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=791"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=791"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=791"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=791"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=791"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}