{"id":410,"date":"2018-03-20T13:49:00","date_gmt":"2018-03-20T12:49:00","guid":{"rendered":"https:\/\/kids.esa.int\/astronauts_get_a_breath_of_fresh_air\/"},"modified":"2026-10-08T00:27:51","modified_gmt":"2026-10-07T22:27:51","slug":"astronauts_get_a_breath_of_fresh_air","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/astronauts_get_a_breath_of_fresh_air\/","title":{"rendered":"Astronautit saavat hengitt\u00e4\u00e4 raitista ilmaa"},"content":{"rendered":"<div class=\"lede\">\n<p>Kansainv\u00e4lisell\u00e4 avaruusasemalla asuvat astronautit tarvitsevat selviyty\u00e4kseen samoja asioita kuin mekin: ruokaa, vett\u00e4 ja happea. N\u00e4m\u00e4 tarvikkeet toimitetaan Maasta rahtialusten avulla. Mutta kuvittele, ett\u00e4 olet astronautti tulevaisuuden avaruusaluksessa, joka matkustaa kaukaiselle planeetalle. Olet liian kaukana Maasta saadaksesi tarvikkeita. Miten hankit selviytymiseen tarvitsemasi? T\u00e4m\u00e4n haasteen ratkaisemiseksi tutkijat tekev\u00e4t parhaillaan kokeilua hapen tuottamiseksi kansainv\u00e4lisell\u00e4 avaruusasemalla.<\/p>\n<\/div>\n<figure class=\"wp-block-image size-large\" data-width=\"6480\" data-credit=\"ESA-M. Cowan,\tCC BY-SA 3.0 IGO\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/03\/Cosmic_farming\" data-licence=\"CC BY-SA 3.0 IGO or 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\/2018\/03\/cosmic_farming\/17869265-2-eng-GB\/Cosmic_farming.jpg\" alt=\"Cosmic farming\"><figcaption>Kosminen maatalous<\/figcaption><\/figure>\n<p>Tiesitk\u00f6, ett\u00e4 kun ihmiset hengitt\u00e4v\u00e4t, he ottavat happea sis\u00e4\u00e4ns\u00e4 ja p\u00e4\u00e4st\u00e4v\u00e4t hiilidioksidia ulos? Kasvit toimivat p\u00e4invastoin: muuntamalla valoa energiaksi (prosessi, jota kutsutaan fotosynteesiksi) ne ottavat hiilidioksidia sis\u00e4\u00e4ns\u00e4 ja tuottavat happea. Kasvien pit\u00e4minen avaruudessa voisi siis olla loistava tapa kierr\u00e4tt\u00e4\u00e4 ilmaa astronauttien k\u00e4ytt\u00f6\u00f6n. Tutkijoiden kokeen tarkoituksena on selvitt\u00e4\u00e4, toimiiko fotosynteesi painottomissa olosuhteissa avaruudessa samalla tavalla kuin maapallolla.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"5312\" data-credit=\"SCK-CEN\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/03\/Spirulina\" 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\/2018\/03\/spirulina\/17885027-2-eng-GB\/Spirulina.jpg\" alt=\"Spirulina\"><figcaption>Spirulina<\/figcaption><\/figure>\n<p>Erityinen bakteerilaji nimelt\u00e4 Arthrospira, joka suorittaa fotosynteesi\u00e4 kasvien tavoin, vietiin ESA:n Columbus-laboratorioon Kansainv\u00e4liselle avaruusasemalle. Se sijoitettiin sitten laitteeseen, jota kutsutaan fotobioreaktoriksi ja joka on valoa runsaasti sis\u00e4lt\u00e4v\u00e4 sylinteri. Arthrospira ottaa talteen astronauttien hengitt\u00e4m\u00e4\u00e4 hiilidioksidia ja muuttaa sen hapeksi. Lis\u00e4etuna on, ett\u00e4 Arthrospira voidaan helposti jalostaa spirulinaksi, joka on eritt\u00e4in ravitsevaa ja jota astronautit voivat sy\u00f6d\u00e4!<\/p>\n<p>Nyt suurin kysymys on, muuttaako avaruudessa oleskelu kasvien kyky\u00e4 tuottaa happea. Auttaako painottomuus niit\u00e4 toimimaan tehokkaammin, vai aiheuttaako se outoja sivuvaikutuksia? Onko avaruudesta tuleva s\u00e4teily hy\u00f6dyllist\u00e4 vai haitallista t\u00e4lle prosessille? Saamme pian vastauksen t\u00e4h\u00e4n kysymykseen.<\/p>\n<p>Ehk\u00e4p\u00e4 tulevaisuudessa olet astronautti, joka matkustaa toiseen maailmaan ja hengitt\u00e4\u00e4 kasvien puhdistamaa ilmaa!<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Tutkijat toivovat voivansa kehitt\u00e4\u00e4 laitteita, jotka kierr\u00e4tt\u00e4v\u00e4t astronauttien virtsan juomakelpoiseksi vedeksi!<\/p>","protected":false},"excerpt":{"rendered":"<p>Astronauts living on-board the International Space Station need the same things that we do to survive: food to eat, water to drink, and oxygen to breathe. These supplies are delivered [&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\/2018\/03\/arthrospira_microalgae\/17879736-2-eng-GB\/Arthrospira_microalgae.jpg","esa_banner_description":"Arthrospira microalgae","esa_banner_credit":"SCK-CEN","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/03\/Arthrospira_microalgae","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-410","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\/410","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=410"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/410\/revisions"}],"predecessor-version":[{"id":4452,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/410\/revisions\/4452"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=410"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=410"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=410"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=410"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=410"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=410"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=410"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}