{"id":850,"date":"2009-02-20T08:59:00","date_gmt":"2009-02-20T07:59:00","guid":{"rendered":"https:\/\/kids.esa.int\/student_experiments_lift_off_with_rexus_bexus\/"},"modified":"2026-10-08T00:32:58","modified_gmt":"2026-10-07T22:32:58","slug":"student_experiments_lift_off_with_rexus_bexus","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/student_experiments_lift_off_with_rexus_bexus\/","title":{"rendered":"Opiskelijoiden kokeet l\u00e4htev\u00e4t liikkeelle REXUS\/BEXUS-ohjelmien avulla"},"content":{"rendered":"
\n

Monilla nuorilla on loistavia ideoita kokeista, jotka he haluaisivat l\u00e4hett\u00e4\u00e4 avaruuteen. Valitettavasti kokeiden l\u00e4hett\u00e4minen satelliitin tai kansainv\u00e4lisen avaruusaseman mukana on usein liian kallista yliopistoille ja kouluille. On kuitenkin olemassa edullisempia ja helpompia vaihtoehtoja. Esimerkiksi ESA:n koulutusyksikk\u00f6 on tarjonnut vuodesta 2007 l\u00e4htien lentoja pienill\u00e4 koeraketeilla ja korkealla lent\u00e4vill\u00e4 ilmapalloilla. N\u00e4m\u00e4 kaksi ohjelmaa tunnetaan nimill\u00e4 REXUS (Rocket-borne Experiments for University Students) ja BEXUS (Balloon-borne Experiments for University Students).<\/p>\n<\/div>\n

REXUS on ohjausj\u00e4rjestelm\u00e4t\u00f6n, kiinte\u00e4\u00e4 polttoainetta k\u00e4ytt\u00e4v\u00e4 yksivaiheinen raketti. Se pystyy kuljettamaan noin 30 kg painavia kokeita jopa 100 km:n korkeuteen maanpinnasta. Kuuden minuutin lennon puoliv\u00e4liss\u00e4 kokeet sis\u00e4lt\u00e4v\u00e4 hy\u00f6tykuormaosa irtoaa. T\u00e4m\u00e4 moduuli putoaa takaisin maahan l\u00e4mp\u00f6suojan suojassa. Lennon loppuvaiheessa laskuvarjot hidastavat sen laskeutumista.<\/p>\n

BEXUS on valtava ilmapallo, jonka halkaisija on 14 metri\u00e4, kun se on t\u00e4ytetty heliumilla. Se pystyy nostamaan 100 kg:n painoisen kuorman 35 km:n korkeuteen ja pysym\u00e4\u00e4n ilmassa jopa 5 tuntia. Kokeilukontti (ns. gondoli) irrotetaan ilmapallosta ja laskeutuu laskuvarjoj\u00e4rjestelm\u00e4n avulla. Hy\u00f6tykuorma palautetaan yleens\u00e4 laukaisupaikalle 1\u20132 p\u00e4iv\u00e4\u00e4 laukaisun j\u00e4lkeen.<\/p>\n

Sek\u00e4 REXUS- ett\u00e4 BEXUS-lennot laukaistaan Kirunasta Pohjois-Ruotsista. Vuosittain j\u00e4rjestet\u00e4\u00e4n useita lentoja, jotka tarjoavat opiskelijoille harvinaisen tilaisuuden suunnitella ja rakentaa kokeita, jotka lent\u00e4v\u00e4t avaruuden rajalle. Toiveena on, ett\u00e4 monet n\u00e4ist\u00e4 opiskelijoista p\u00e4\u00e4tyv\u00e4t my\u00f6hemmin ty\u00f6skentelem\u00e4\u00e4n Euroopan avaruusteollisuudessa.<\/p>","protected":false},"excerpt":{"rendered":"

Many young people have great ideas about experiments they\u2019d like to send into space. Unfortunately, flying experiments on a satellite or the International Space Station is often too expensive for […]<\/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\/2009\/02\/bexus2\/17872077-2-eng-GB\/BEXUS.jpg","esa_banner_description":"BEXUS","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2009\/02\/BEXUS2","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":[10,41,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-850","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/850","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=850"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/850\/revisions"}],"predecessor-version":[{"id":1993,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/850\/revisions\/1993"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=850"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=850"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=850"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=850"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=850"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=850"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=850"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}