{"id":137227,"date":"2026-01-09T00:24:09","date_gmt":"2026-01-09T00:24:09","guid":{"rendered":"https:\/\/www.europesays.com\/fi\/137227\/"},"modified":"2026-01-09T00:24:09","modified_gmt":"2026-01-09T00:24:09","slug":"suuren-asteroidin-huomattiin-pyorivan-vinhasti","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fi\/137227\/","title":{"rendered":"Suuren asteroidin huomattiin py\u00f6riv\u00e4n vinhasti"},"content":{"rendered":"<p>Asteroidivy\u00f6hykkeell\u00e4 sijaitseva 2025 MN45 py\u00f6r\u00e4ht\u00e4\u00e4 itsens\u00e4 ymp\u00e4ri alle kahdessa minuutissa. T\u00e4m\u00e4 on melkoinen saavutus yli 700-metriselle kivenj\u00e4rk\u00e4leelle.&#13;<\/p>\n<p class=\"bodytext\">Vera C. Rubin -observatorion datasta on paljastanut useita nopeasti py\u00f6rivi\u00e4 asteroideja. Suuri osa niist\u00e4 on kooltaan sadasta metrist\u00e4 muutamaan sataan metriin, mutta yhden halkaisija on jopa 710 metri\u00e4.\n<\/p>\n<p>Kyseinen asteroidi tekee t\u00e4yden py\u00f6r\u00e4hdyksen vain 1,88 minuutissa. Se onkin nopeimmin py\u00f6riv\u00e4 yli 500-metrinen asteroidi, mit\u00e4 on koskaan l\u00f6ydetty.\n<\/p>\n<p>&#8221;Selv\u00e4sti asteroidin t\u00e4ytyy koostua eritt\u00e4in vahvoista materiaaleista pysy\u00e4kseen yhten\u00e4 kappaleena py\u00f6riess\u00e4\u00e4n n\u00e4in nopeasti&#8221;, toteaa <strong>Sarah Greenstreet<\/strong> NOIRLabista.\n<\/p>\n<p>&#8221;Laskimme, ett\u00e4 sen vahvuuden t\u00e4ytyy vastata kiinte\u00e4\u00e4 kive\u00e4. T\u00e4m\u00e4 on hieman yll\u00e4tt\u00e4v\u00e4\u00e4, sill\u00e4 useimpien asteroidien uskotaan olevan niin kutsuttuja romukasa-asteroideja. T\u00e4m\u00e4 tarkoittaa, ett\u00e4 ne koostuvat monista pienist\u00e4 kiven paloista, jotka ovat yhdistyneet painovoiman vaikutuksesta.\u201d\n<\/p>\n<p>Rubin-observatorio on vasta aloittelemassa varsinaista ty\u00f6t\u00e4\u00e4n, joten nyt julkaistut varhaiset tulokset lupaavat paljon vastaavia l\u00f6yt\u00f6j\u00e4 tulevaisuudessa.\n<\/p>\n<p><a href=\"https:\/\/noirlab.edu\/public\/news\/noirlab2601\/?lang\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">Aiheesta lis\u00e4\u00e4 NOIRLab<\/a> (englanniksi)<\/p>\n","protected":false},"excerpt":{"rendered":"Asteroidivy\u00f6hykkeell\u00e4 sijaitseva 2025 MN45 py\u00f6r\u00e4ht\u00e4\u00e4 itsens\u00e4 ymp\u00e4ri alle kahdessa minuutissa. T\u00e4m\u00e4 on melkoinen saavutus yli 700-metriselle kivenj\u00e4rk\u00e4leelle.&#13; Vera&hellip;\n","protected":false},"author":2,"featured_media":137228,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[453,33,31,30,118,452,32,119],"class_list":{"0":"post-137227","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-avaruus","8":"tag-avaruus","9":"tag-fi","10":"tag-finland","11":"tag-finnish","12":"tag-science","13":"tag-space","14":"tag-suomi","15":"tag-tiede"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fi\/115862297831540644","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts\/137227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/comments?post=137227"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts\/137227\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/media\/137228"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/media?parent=137227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/categories?post=137227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/tags?post=137227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}