{"id":983,"date":"2009-07-03T07:00:00","date_gmt":"2009-07-03T05:00:00","guid":{"rendered":"https:\/\/kids.esa.int\/ulysses\/"},"modified":"2026-10-08T00:34:30","modified_gmt":"2026-10-07T22:34:30","slug":"ulysses","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/ulysses\/","title":{"rendered":"Ulysses"},"content":{"rendered":"<div class=\"lede\">\n<p>Yksi kaikkien aikojen pisimmist\u00e4 avaruuslennoista p\u00e4\u00e4ttyi 30. kes\u00e4kuuta 2009, kun viimeinen komento l\u00e4hetettiin ESA:n ja NASA:n Ulysses-avaruusalukselle. Ulysses nimettiin legendaarisen kreikkalaisen sankarin mukaan, joka selvisi lukuisista seikkailuista 20 vuotta kest\u00e4neen, kodistaan kaukana vietetyn \u201codysseian\u201d aikana. Lokakuussa 1990 laukaistu avaruusluotain koki matkan varrella my\u00f6s monia seikkailuja ja vietti l\u00e4hes yht\u00e4 kauan aikaa tutkien tuntematonta.<\/p>\n<\/div>\n<p>Yli 18 vuoden aikana avaruudessa Ulysses teki monia l\u00e4pimurtoja. Helmikuussa 1992 Jupiterin ohilennon aikana j\u00e4ttil\u00e4isplaneetan voimakas painovoima heitti avaruusaluksen ainutlaatuiseen kiertoradalle, joka vei sen kauas planeettojen kiertoratojen yl\u00e4- ja alapuolelle. Ensimm\u00e4ist\u00e4 kertaa tutkijat pystyiv\u00e4t tekem\u00e4\u00e4n yksityiskohtaisia tutkimuksia Auringon napa-alueista ja niiden yhteyksist\u00e4 yli\u00e4\u00e4niseen aurinkotuuleen.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"ESA (animation by C.Carreau)\" data-detail-url=\"https:\/\/www.esa.int\/Media\/Animations\/Ulysses_orbit_animation_2009\" 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\/media\/animations\/ulysses_orbit_animation_2009\/1472-5-eng-GB\/Ulysses_orbit_animation_2009.jpg\" alt=\"\"><\/figure>\n<p>Ulyssesin teht\u00e4v\u00e4n oli m\u00e4\u00e4r\u00e4 p\u00e4\u00e4tty\u00e4 vuonna 1995, mutta t\u00e4m\u00e4 sitke\u00e4 pieni avaruusalus jatkoi toimintaansa ja suoritti lopulta kolme ohilentoa Auringon napojen yli. Kaksi n\u00e4ist\u00e4 tapahtui, kun Aurinko oli rauhallisessa tilassa, kun taas vuosina 2000\u20132001 Auringon aktiivisuus oli huipussaan.<\/p>\n<p>Valitettavasti Ulyssesin ydinvoimal\u00e4hde ehtyi v\u00e4hitellen, kunnes rohkea matkailija alkoi kamppailla toimintakykyns\u00e4 s\u00e4ilytt\u00e4miseksi. Satelliitin toiminnan lopettamisen oli m\u00e4\u00e4r\u00e4 tapahtua vuonna 2008, mutta operaattorit pystyiv\u00e4t est\u00e4m\u00e4\u00e4n sen jumiutumisen suorittamalla lyhyen ty\u00f6nt\u00f6voimapurskauksen kahden tunnin v\u00e4lein. Ulysses kuitenkin et\u00e4\u00e4ntyi yh\u00e4 kauemmas Maasta, ja vuoden 2009 puoliv\u00e4liin menness\u00e4 heikko viestint\u00e4yhteys johti siihen, ett\u00e4 tieteellisi\u00e4 tietoja saatiin en\u00e4\u00e4 hyvin v\u00e4h\u00e4n. Oli tullut aika sanoa hyv\u00e4stit t\u00e4lle avaruuden edell\u00e4k\u00e4vij\u00e4lle.<\/p>","protected":false},"excerpt":{"rendered":"<p>One of the longest space missions ever made came to an end on 30 June 2009 when the final command was sent to the ESA\/NASA Ulysses spacecraft. Ulysses was named [&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\/2008\/06\/artist_s_impression_of_ulysses8\/17893388-2-eng-GB\/Artist_s_impression_of_Ulysses.jpg","esa_banner_description":"Artist\u2019s impression of Ulysses","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\/2008\/06\/Artist_s_impression_of_Ulysses8","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-983","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\/983","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=983"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/983\/revisions"}],"predecessor-version":[{"id":4775,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/983\/revisions\/4775"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=983"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=983"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=983"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=983"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=983"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=983"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=983"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}