{"id":867,"date":"2011-04-26T08:48:00","date_gmt":"2011-04-26T06:48:00","guid":{"rendered":"https:\/\/kids.esa.int\/esa_astronaut_to_launch_on_dark_matter_mission\/"},"modified":"2026-10-08T00:33:10","modified_gmt":"2026-10-07T22:33:10","slug":"esa_astronaut_to_launch_on_dark_matter_mission","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/esa_astronaut_to_launch_on_dark_matter_mission\/","title":{"rendered":"ESA:n astronautti l\u00e4htee pime\u00e4n aineen tutkimusmatkalle"},"content":{"rendered":"
\n

Katso ymp\u00e4rillesi. Vaikuttaa ilmeiselt\u00e4, ett\u00e4 kaikki koostuu kiinteist\u00e4 aineista, nesteist\u00e4 ja kaasuista. Silm\u00e4si kuitenkin pett\u00e4v\u00e4t sinua. Suurin osa maailmankaikkeudesta ei koostu tavallisesta aineesta. Sen sijaan se n\u00e4ytt\u00e4\u00e4 koostuvan suurelta osin salaper\u00e4isest\u00e4 pime\u00e4st\u00e4 aineesta ja viel\u00e4 salaper\u00e4isemm\u00e4st\u00e4 pime\u00e4st\u00e4 energiasta. Jotta voitaisiin oppia lis\u00e4\u00e4 t\u00e4st\u00e4 n\u00e4kym\u00e4tt\u00f6m\u00e4st\u00e4 maailmankaikkeudesta, kansainv\u00e4liselle avaruusasemalle (ISS) on tulossa toimitettavaksi uusi tehokas laite, joka tunnetaan nimell\u00e4 Alpha Magnetic Spectrometer (AMS-02).<\/p>\n<\/div>\n

AMS-02 kuljetetaan avaruusasemalle huhtikuun lopulla, avaruussukkula Endeavourin viimeisell\u00e4 lennolla. Mukana lennolla ovat my\u00f6s ESA:n astronautti Roberto Vittori ja viisi muuta matkustajaa. Roberto on ensimm\u00e4inen ESA:n astronautti, joka on lent\u00e4nyt avaruusasemalle kolme kertaa. H\u00e4n on my\u00f6s viimeinen eurooppalainen \u2013 ja viimeinen muu kuin amerikkalainen \u2013 joka lent\u00e4\u00e4 avaruussukkulalla.<\/p>\n

Yksi h\u00e4nen teht\u00e4vist\u00e4\u00e4n on nostaa AMS-02-hiukkasilmaisin rahtitilasta Endeavourin robottik\u00e4sivarren avulla ja kiinnitt\u00e4\u00e4 se kansainv\u00e4liseen avaruusasemaan (ISS). Seitsem\u00e4n tonnia painava laite on toiminnassa v\u00e4hint\u00e4\u00e4n kolme vuotta. Sen avulla mitataan, mit\u00e4 tapahtuu, kun kaukaisista galakseista saapuu korkeaenergisi\u00e4 hiukkasia, joita kutsutaan kosmisiksi s\u00e4teiksi. N\u00e4iden kosmisten s\u00e4teiden t\u00f6rm\u00e4yksiss\u00e4 syntyv\u00e4t oudot hiukkaset voivat tarjota todisteita antimaterian tai pime\u00e4n aineen olemassaolosta.<\/p>\n

Suuren alkur\u00e4j\u00e4hdyksen aikana uskotaan syntyneen yht\u00e4 paljon ainetta ja antimateriaa, mutta antimateria n\u00e4ytt\u00e4\u00e4 kadonneen nykyisest\u00e4 maailmankaikkeudesta. Pime\u00e4n aineen uskotaan olevan paljon yleisemp\u00e4\u00e4 kuin tavallista ainetta, mutta sit\u00e4 ei ole viel\u00e4 havaittu suoraan. Roberto Vittorin tutkimusmatkalle annettu nimi \u2018DAMA\u2019 viittaa t\u00e4h\u00e4n pime\u00e4n aineen etsint\u00e4\u00e4n.<\/p>","protected":false},"excerpt":{"rendered":"

Look around. It seems obvious that everything is made of solids, liquids and gases. However, your eyes are being deceived. Most of the Universe is not made of ordinary matter. […]<\/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\/05\/the_ring_of_dark_matter2\/17893833-2-eng-GB\/The_ring_of_dark_matter.jpg","esa_banner_description":"","esa_banner_credit":"NASA, ESA, M. Jee and H. Ford (Johns Hopkins University)","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/05\/The_ring_of_dark_matter2","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-867","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\/867","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=867"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/867\/revisions"}],"predecessor-version":[{"id":2010,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/867\/revisions\/2010"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=867"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=867"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=867"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=867"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=867"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=867"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=867"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}