{"id":191,"date":"2021-12-02T12:46:55","date_gmt":"2021-12-02T11:46:55","guid":{"rendered":"https:\/\/kids.esa.int\/hubble_views_the_colourful_veil\/"},"modified":"2026-10-08T00:25:18","modified_gmt":"2026-10-07T22:25:18","slug":"hubble_views_the_colourful_veil","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/hubble_views_the_colourful_veil\/","title":{"rendered":"Hubble havaitsee v\u00e4rikk\u00e4\u00e4n verhon"},"content":{"rendered":"
\n

Kuten el\u00e4v\u00e4t olennot, my\u00f6s t\u00e4hdet vanhenevat ja kuolevat. Mutta massiiviset t\u00e4hdet eiv\u00e4t katoa hiljaa. Sen sijaan ne sammuvat valtavalla r\u00e4j\u00e4hdyksell\u00e4. Supernovan loistavan valoshow\u2019n j\u00e4lkeen j\u00e4ljelle j\u00e4\u00e4 vain kuuma, hehkuva kaasukuori, joka pakenee t\u00e4hden kuoleman paikalta suurella nopeudella.<\/p>\n<\/div>\n

Yksi kauneimmista supernovan j\u00e4\u00e4nn\u00f6ksist\u00e4 on Verhosumu, himme\u00e4 j\u00e4\u00e4nteiden muodostama rengas Joutsenen t\u00e4hdist\u00f6ss\u00e4. NASA:n ja ESA:n Hubble-avaruusteleskoopilla otetut kuvat esitt\u00e4v\u00e4t h\u00e4mm\u00e4stytt\u00e4v\u00e4n yksityiskohtaisesti j\u00e4ttil\u00e4ist\u00e4hden hajonneet j\u00e4\u00e4nn\u00f6kset. Ainoastaan savumaiset kaasus\u00e4ikeet ovat j\u00e4ljell\u00e4.<\/p>\n

Hubble-kuvat esitt\u00e4v\u00e4t toisiinsa kietoutuneita, k\u00f6ydenkaltaisia kaasus\u00e4ikeit\u00e4 Veil-sumun kolmessa eri osassa. V\u00e4rikk\u00e4\u00e4t s\u00e4ikeet syntyv\u00e4t valtavasta energiasta, joka vapautuu, kun r\u00e4j\u00e4hdyksen nopeasti liikkuvat j\u00e4\u00e4nteet t\u00f6rm\u00e4\u00e4v\u00e4t ymp\u00e4rist\u00f6\u00f6ns\u00e4. Kaasun liikkumisen aiheuttamat paineaallot, joiden nopeus on 600 000 km tunnissa, kuumentavat kaasun miljoonien asteiden l\u00e4mp\u00f6tilaan.<\/p>\n

Hubble-kuvissa n\u00e4kyy kaksi erottuvaa piirrett\u00e4: ter\u00e4vi\u00e4, lineaarisia s\u00e4ikeit\u00e4 ja laajoja pilvi\u00e4. T\u00e4m\u00e4 johtuu siit\u00e4, ett\u00e4 n\u00e4emme ne eri kulmista. S\u00e4ikeet vastaavat ohuen iskuaallon etureunan sivulta katsottua n\u00e4kym\u00e4\u00e4, kun taas pilvet vastaavat edest\u00e4 katsottua n\u00e4kym\u00e4\u00e4. V\u00e4rit kuvaavat iskuaaltojen viritt\u00e4mien eri atomien l\u00e4hett\u00e4m\u00e4\u00e4 valoa: sininen edustaa happea, vihre\u00e4 rikki\u00e4 ja punainen vety\u00e4.<\/p>\n

Supernovan r\u00e4j\u00e4hdys tapahtui 5 000\u201310 000 vuotta sitten, jolloin esi-is\u00e4mme olisivat n\u00e4hneet t\u00e4hden kirkkauden kasvavan \u00e4killisesti, kunnes se oli yht\u00e4 kirkas kuin puolikuu.<\/p>","protected":false},"excerpt":{"rendered":"

Like living things, stars grow old and die. But heavyweight stars don\u2019t fade away quietly. Instead, they go out with an enormous bang. All that remains after the brilliant light […]<\/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\/08\/uncovering_the_veil_nebula\/17905793-2-eng-GB\/Uncovering_the_Veil_Nebula.jpg","esa_banner_description":"Uncovering the Veil Nebula","esa_banner_credit":"NASA - ESA - Hubble Heritage (STScI\/AURA)-ESA\/Hubble Collaboration","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/08\/Uncovering_the_Veil_Nebula","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":[10,44,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-191","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/191","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=191"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/191\/revisions"}],"predecessor-version":[{"id":1334,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/191\/revisions\/1334"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=191"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=191"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=191"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=191"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=191"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=191"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=191"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}