{"id":916,"date":"2007-01-11T09:35:00","date_gmt":"2007-01-11T08:35:00","guid":{"rendered":"https:\/\/kids.esa.int\/corot-_europe_s_planet-seeker\/"},"modified":"2026-10-08T00:33:44","modified_gmt":"2026-10-07T22:33:44","slug":"corot-_europe_s_planet-seeker","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/corot-_europe_s_planet-seeker\/","title":{"rendered":"COROT \u2013 Euroopan planeettojen etsij\u00e4"},"content":{"rendered":"<div class=\"lede\">\n<p>Auringinkuntamme ulkopuolella sijaitsevien planeettojen etsint\u00e4 siirtyi uuteen aikakauteen 27. joulukuuta 2006, kun Euroopan COROT-avaruusluotain laukaistiin avaruuteen. Uuden version Sojuz-raketilla kiertoradalle viety COROT laukaistiin Baikonurin avaruuskeskuksesta Kazakstanista klo 15.23 CET. 50 minuuttia my\u00f6hemmin 630 kg painava satelliitti saatiin t\u00e4ydelliselle polaarikiertoradalle, 900 km:n korkeuteen maanpinnasta.<\/p>\n<\/div>\n<p>Siit\u00e4 l\u00e4htien COROTin 30 cm:n kaukoputkea ja eritt\u00e4in herkk\u00e4\u00e4 kameraa on k\u00e4ytetty \u2018t\u00e4htij\u00e4ristysten\u2019 tutkimiseen ja uusien maailmojen etsimiseen. Avaruusluotain ker\u00e4\u00e4 120 000 t\u00e4hden heikkoa valoa ja l\u00e4hett\u00e4\u00e4 sen erityiseen kaksiosaiseseen kameraan.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"537\" data-credit=\"CNES\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/11\/Planet_transit_in_front_of_a_star2\" 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\/2006\/11\/planet_transit_in_front_of_a_star2\/17867526-3-eng-GB\/Planet_transit_in_front_of_a_star.jpg\" alt=\"Planet transit in front of a star\"><figcaption>Planeetan kulku t\u00e4hden edess\u00e4<\/figcaption><\/figure>\n<p>Kameran toinen puoli on suunniteltu kaukaisten planeettojen l\u00f6yt\u00e4miseen. T\u00e4m\u00e4 tapahtuu rekister\u00f6im\u00e4ll\u00e4 t\u00e4htien kirkkauden pienet heikkenemiset, kun planeetta kulkee t\u00e4hden edest\u00e4. Monet COROTin l\u00f6yt\u00e4mist\u00e4 kohteista ovat \u2018kuumia Jupiter-tyyppisi\u00e4 planeettoja\u2019 \u2013 j\u00e4ttil\u00e4isplaneettoja, jotka kiert\u00e4v\u00e4t hyvin l\u00e4hell\u00e4 t\u00e4hti\u00e4\u00e4n. Se on kuitenkin havainnut my\u00f6s pienen m\u00e4\u00e4r\u00e4n \u2018supermaita\u2019. N\u00e4m\u00e4 kiviset planeetat ovat vain muutaman kerran Maata suurempia. COROT-7b \u2013 jonka halkaisija on alle kaksi kertaa Maan halkaisija \u2013 oli pienin koskaan l\u00f6ydetty eksoplaneetta.<\/p>\n<p>Kameran toinen puoli pystyy havaitsemaan t\u00e4htien valovoimassa tapahtuvia pieni\u00e4 muutoksia, jotka johtuvat t\u00e4htien pinnalla levi\u00e4vist\u00e4 \u00e4\u00e4niaalloista. N\u00e4m\u00e4 ovat verrattavissa maapallon maanj\u00e4ristysaaltoihin, ja niiden avulla tutkijat voivat saada paljon tietoa kunkin t\u00e4hden sis\u00e4olosuhteista. Vastaavia tutkimuksia Auringosta on jo tehty ESA:n SOHO-avaruusluotaimella.<\/p>","protected":false},"excerpt":{"rendered":"<p>The search for planets far beyond our Solar System entered a new era on 27 December 2006 with the launch of Europe\u2019s COROT spacecraft. Carried into orbit by a new [&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\/2006\/11\/artist_s_impression_of_corot3\/17888727-2-eng-GB\/Artist_s_impression_of_COROT.jpg","esa_banner_description":"","esa_banner_credit":"CNES - D. 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