{"id":558,"date":"2014-11-13T08:43:00","date_gmt":"2014-11-13T07:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/philae_lands_on_a_comet\/"},"modified":"2026-10-08T00:29:37","modified_gmt":"2026-10-07T22:29:37","slug":"philae_lands_on_a_comet","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/philae_lands_on_a_comet\/","title":{"rendered":"Philae laskeutuu komeetalle"},"content":{"rendered":"<div class=\"lede\">\n<p>Laskeutuminen onnistui! Ensimm\u00e4ist\u00e4 kertaa ihmiskunnan historiassa olemme laskeutuneet avaruusaluksella komeetan pinnalle.<\/p>\n<\/div>\n<p>Kymmenen vuoden matkan j\u00e4lkeen Rosetta ja Philae saapuivat lopulta elokuussa m\u00e4\u00e4r\u00e4np\u00e4\u00e4h\u00e4ns\u00e4, komeetta 67P\/Churyumov-Gerasimenkoon. Siit\u00e4 l\u00e4htien Rosetta on l\u00e4hestynyt komeettaa yh\u00e4 enemm\u00e4n valmistautuakseen teht\u00e4v\u00e4n seuraavaan haasteeseen \u2013 Philaen laskemiseen komeetan pinnalle.<\/p>\n<p>Mit\u00e4 l\u00e4hemm\u00e4ksi Rosetta p\u00e4\u00e4si t\u00e4t\u00e4 outoa maailmaa, sit\u00e4 ihmeellisemm\u00e4ksi se muuttui. Huomasimme, ett\u00e4 se on t\u00e4ynn\u00e4 kraattereita, jyrkki\u00e4 kallioita ja talonkokoisia kivi\u00e4. Pinnalta purkautuu jopa kaasu- ja p\u00f6lypilvi\u00e4.<\/p>\n<p>Tutkittuaan planeetan pintaa useiden viikkojen ajan asiantuntijat valitsivat lopulta parhaan laskeutumispaikan Philaelle. Kun t\u00e4m\u00e4 p\u00e4\u00e4t\u00f6s oli tehty, seuraavana teht\u00e4v\u00e4n\u00e4 oli valita paras reitti komeetan ymp\u00e4ri, jotta Philae laskeutuisi oikeaan paikkaan.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1891\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/11\/Farewell_Philae\" 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\/2014\/11\/farewell_philae\/17891428-2-eng-GB\/Farewell_Philae.jpg\" alt=\"Rosetta&#x27;s OSIRIS camera captured this image of Philae after it separated\"><figcaption>Rosettan OSIRIS-kamera otti t\u00e4m\u00e4n kuvan Philaesta sen irrottumisen j\u00e4lkeen<\/figcaption><\/figure>\n<p>Lopulta oli tullut aika, ett\u00e4 Philae j\u00e4tti Rosettalle j\u00e4\u00e4hyv\u00e4iset ja valmistautui t\u00e4h\u00e4n menness\u00e4 suurimpaan haasteeseensa. Eilen varhain aamulla Philae aloitti pitk\u00e4n laskeutumisensa komeetalle. Seitsem\u00e4n j\u00e4nnitt\u00e4v\u00e4\u00e4 tuntia istuimme avuttomina odottamassa, kun Philae ajelehti avaruudessa; ilman mahdollisuutta ohjata sit\u00e4, jos se poikkeaisi kurssiltaan.<\/p>\n<p>Lopulta, syv\u00e4n helpotuksen huokauksen ja suosionosoitusten saattelemana, saimme Philaelta tiedon, ett\u00e4 se oli saapunut perille turvallisesti ja ett\u00e4 t\u00e4m\u00e4 uskomaton saavutus oli toteutunut!<\/p>\n<p>Philae on jo alkanut ker\u00e4t\u00e4 mahdollisimman paljon tietoa t\u00e4st\u00e4 kiehtovasta pienest\u00e4 maailmasta. Yhdess\u00e4 Rosettan kanssa, joka kiert\u00e4\u00e4 komeetan yl\u00e4puolella l\u00e4hell\u00e4, t\u00e4m\u00e4 pieni luotain auttaa meit\u00e4 ymm\u00e4rt\u00e4m\u00e4\u00e4n yht\u00e4 aurinkokuntamme vanhimmista kohteista.<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Churyumov-Gerasimenko\/67P-komeetta kiit\u00e4\u00e4 t\u00e4ll\u00e4 hetkell\u00e4 kohti Aurinkoa 60 000 km:n tuntinopeudella, mik\u00e4 on yli kaksi kertaa nopeammin kuin avaruussukkula!<\/p><\/p>","protected":false},"excerpt":{"rendered":"<p>Touchdown! For the first time in human history we have landed a spacecraft on the surface of a comet. After a 10-year journey, Rosetta and Philae finally reached their destination [&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\/2014\/11\/philae_touchdown\/18245810-2-eng-GB\/Philae_touchdown.jpg","esa_banner_description":"Touchdown!","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/11\/Philae_touchdown","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-558","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\/558","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=558"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/558\/revisions"}],"predecessor-version":[{"id":4549,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/558\/revisions\/4549"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=558"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=558"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=558"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=558"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=558"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=558"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=558"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}