{"id":1065,"date":"2007-11-16T14:27:00","date_gmt":"2007-11-16T13:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/brief_homecoming_for_esa_s_comet_chaser\/"},"modified":"2026-10-08T00:35:30","modified_gmt":"2026-10-07T22:35:30","slug":"brief_homecoming_for_esa_s_comet_chaser","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/brief_homecoming_for_esa_s_comet_chaser\/","title":{"rendered":"ESA:n komeettatutkimusluotaimen lyhyt paluu kotiin"},"content":{"rendered":"
\n

Vanha yst\u00e4v\u00e4 palasi kotiin pikavierailulle 13. marraskuuta. 44 kuukautta sen j\u00e4lkeen, kun se laukaistiin Kourousta Ranskan Guayanasta, ESA:n Rosetta-avaruusluotain ohitti Maan toisen kerran. Euroopan komeettatutkimusluotain on nyt lent\u00e4nyt hieman yli 3 miljardia kilometri\u00e4, mutta sill\u00e4 on viel\u00e4 4 miljardia kilometri\u00e4 matkaa j\u00e4ljell\u00e4 ennen kuin se saapuu m\u00e4\u00e4r\u00e4np\u00e4\u00e4h\u00e4ns\u00e4, komeetta 67\/P Churyumov-Gerasimenkoon, vuonna 2014.<\/p>\n<\/div>\n

Rosetta pomppii aurinkokunnan sis\u00e4osissa kuin biljardipallo, kun se kiihtyy ja muuttaa lentorataansa ohittaessaan Maan ja Marsin. T\u00e4m\u00e4 viimeisin virstanpylv\u00e4s t\u00e4ll\u00e4 eeppisell\u00e4 matkalla oli kolmas nelj\u00e4st\u00e4 Rosettalle suunnitellusta planeettojen ohituksesta.<\/p>\n

Sen j\u00e4lkeen kun Rosettan kiertorataa oli hienos\u00e4\u00e4detty 18. lokakuuta 42 sekunnin mittaisella ohjausmoottorien sytytyksell\u00e4, alus oli juuri oikealla kurssilla Maan ohilennon suhteen. Klo 21.57 CET 3 tonnin painoinen avaruusalus ohitti planeetan 45 000 km\/h (12,5 km\/s) nopeudella. Kun se lensi Chilen lounaispuolella Tyynenmeren yli, Rosetta oli vain 5 295 km:n korkeudella.<\/p>\n

L\u00e4himm\u00e4n kohtaamisen aikoihin Rosetta tarkasteli Maata tarkasti: se teki havaintoja sen ilmakeh\u00e4st\u00e4 ja magneettikeh\u00e4st\u00e4, kuvasi kaupunkialueita ja etsi avaruudesta tulevia meteoreja. Sen j\u00e4lkeen se aloitti sarjan havaintoja Maa-Kuu-j\u00e4rjestelm\u00e4st\u00e4 matkallaan pois kohti avaruutta.<\/p>\n

Avaruusluotain laukaistaan nyt kohti aurinkokunnan ulko-osia, ennen kuin se palaa Maahan viimeisen kerran marraskuussa 2009. Ennen sit\u00e4, kun se ylitt\u00e4\u00e4 asteroidivy\u00f6hykkeen, Rosetta k\u00e4ytt\u00e4\u00e4 tilaisuutta hyv\u00e4kseen ja tutkii asteroidi Steinsia l\u00e4hiet\u00e4isyydelt\u00e4 syyskuussa 2008.<\/p>","protected":false},"excerpt":{"rendered":"

An old friend returned home for a flying visit on 13 November. 44 months after its launch from Kourou, French Guiana, ESA\u2019s Rosetta spacecraft swept past the Earth for 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\/2007\/11\/swing-by_animation2\/17881992-2-eng-GB\/Swing-by_animation.jpg","esa_banner_description":"Swing-by animation","esa_banner_credit":"ESA - C. Carreau","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/11\/Swing-by_animation2","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":[46,10,11],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1065","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1065","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=1065"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1065\/revisions"}],"predecessor-version":[{"id":2208,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1065\/revisions\/2208"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=1065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=1065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=1065"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=1065"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=1065"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=1065"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=1065"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=1065"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=1065"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=1065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}