{"id":427,"date":"2015-03-26T12:40:00","date_gmt":"2015-03-26T11:40:00","guid":{"rendered":"https:\/\/kids.esa.int\/fishing_for_space_junk\/"},"modified":"2026-10-08T00:28:04","modified_gmt":"2026-10-07T22:28:04","slug":"fishing_for_space_junk","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/fishing_for_space_junk\/","title":{"rendered":"Avaruusromun kalastus"},"content":{"rendered":"<p>Vuonna 1957 Sputnikista tuli ensimm\u00e4inen keinotekoinen satelliitti, joka onnistui p\u00e4\u00e4sem\u00e4\u00e4n avaruuteen. Siit\u00e4 l\u00e4htien on laukaistu tuhansia satelliitteja. N\u00e4m\u00e4 satelliitit, jotka nyky\u00e4\u00e4n kiert\u00e4v\u00e4t maapalloamme, ovat antaneet meille mahdollisuuden l\u00f6yt\u00e4\u00e4 tien kotiin mist\u00e4 tahansa, puhua ihmisten kanssa ymp\u00e4ri maailmaa milloin tahansa, seurata katoavia metsi\u00e4 ja j\u00e4\u00e4peitteit\u00e4 sek\u00e4 jopa ennustaa luonnonkatastrofeja.<\/p>\n<p>Mutta satelliittien aikakausi on my\u00f6s t\u00e4ytt\u00e4nyt Maan ymp\u00e4rill\u00e4 olevan avaruuden suurilla, elottomilla metallikappaleilla. Arviolta 30 000 suurta avaruusromun kappaletta kiert\u00e4\u00e4 maapalloa. Niihin kuuluu kaikkea k\u00e4yt\u00f6st\u00e4 poistetuista satelliiteista ja hyl\u00e4tyist\u00e4 rakettiosista aina astronauttien k\u00e4sineisiin asti. T\u00e4m\u00e4 m\u00e4\u00e4r\u00e4 vain kasvaa!<\/p>\n<p>Lis\u00e4ksi avaruudessa on miljoonia pienempi\u00e4 roskia, kuten muttereita, pultteja ja jopa maalihiukkasia. Monet niist\u00e4 liikkuvat maapallon ymp\u00e4ri 7 km:n sekuntinopeudella. Tuolla nopeudella maalihiukkasella voi olla sama iskuvoima kuin 95 km:n tuntinopeudella ajavalla moottoripy\u00f6r\u00e4ll\u00e4!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/03\/Paxi_nets_ESA_s_Clean_Space_team\" 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\/2015\/03\/paxi_nets_esa_s_clean_space_team\/17884916-2-eng-GB\/Paxi_nets_ESA_s_Clean_Space_team.jpg\" alt=\"Paxi nets ESA&#x27;s Clean Space team\"><figcaption>Paxi sai ESA:n Clean Space -tiimin asiakkaakseen<\/figcaption><\/figure>\n<p>T\u00e4llainen t\u00f6rm\u00e4ys vahingoittaisi mit\u00e4 tahansa satelliittia tai avaruusasemaa ja synnytt\u00e4isi uusia vaarallisia avaruusromun palasia. Siksi ESA on asettanut parhaat asiantuntijansa selvitt\u00e4m\u00e4\u00e4n ratkaisua t\u00e4h\u00e4n hankalaan ongelmaan. No, he saattavat juuri olla l\u00f6yt\u00e4neet t\u00e4ydellisen ratkaisun hy\u00f6dynt\u00e4m\u00e4ll\u00e4 yht\u00e4 ihmiskunnan vanhimmista tekniikoista \u2013 kalaverkkoa.<\/p>\n<p>K\u00e4ytt\u00e4m\u00e4ll\u00e4 avaruusaluksesta laukaistavia, erityisesti t\u00e4t\u00e4 tarkoitusta varten suunniteltuja verkkoja voimme napata kuolleita satelliitteja ja tuoda ne alas. T\u00e4t\u00e4 nerokasta ideaa testataan parhaillaan painovoimattomassa tilassa, ja jos kaikki sujuu hyvin, ESA:n \u2018e.Deorbit\u2019-missio k\u00e4ynnistyy vuonna 2021, jolloin p\u00e4\u00e4semme napattamaan muutamia satelliitteja!<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Jotta satelliitti pysyisi avaruudessa eik\u00e4 sy\u00f6ksyisi takaisin Maahan, sen on kierrett\u00e4v\u00e4 maapalloa yli 28 200 kilometrin tuntinopeudella!<\/p>","protected":false},"excerpt":{"rendered":"<p>In 1957, Sputnik became the first artificial satellite to successfully reach space. Since then, thousands of satellites have been launched. These satellites surrounding our planet today have given us the [&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\/2015\/03\/nrc_evaluates_nasa_s_orbital_debris_programs\/17906311-2-eng-GB\/NRC_evaluates_Nasa_s_orbital_debris_programs.jpg","esa_banner_description":"","esa_banner_credit":"NASA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/03\/NRC_evaluates_Nasa_s_orbital_debris_programs","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":[10,65,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-427","post","type-post","status-publish","format-standard","hentry","category-learn","category-mission-control","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/427","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=427"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/427\/revisions"}],"predecessor-version":[{"id":4463,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/427\/revisions\/4463"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=427"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=427"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=427"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=427"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=427"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=427"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=427"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}