{"id":181715,"date":"2026-05-19T08:50:14","date_gmt":"2026-05-19T08:50:14","guid":{"rendered":"https:\/\/www.europesays.com\/ee\/181715\/"},"modified":"2026-05-19T08:50:14","modified_gmt":"2026-05-19T08:50:14","slug":"antarktika-raud-tunnistab-et-maa-on-labimas-tahtedevahelist-pilve-universum","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ee\/181715\/","title":{"rendered":"Antarktika raud tunnistab, et Maa on l\u00e4bimas t\u00e4htedevahelist pilve | Universum"},"content":{"rendered":"<p>P\u00e4ikeses\u00fcsteem liigub praegu koos Maakera ja meie k\u00f5igiga l\u00e4bi h\u00f5reda t\u00e4htedevahelise pilve, ja Saksa teadlased on saanud sellele varemgi kahtlustatud t\u00f5igale uut ja senisest kindlamat t\u00f5endust.<\/p>\n<p>T\u00f5endus p\u00e4rineb Antarktikast, mille j\u00e4\u00e4s ja lumes sisaldub suhteliselt rohkesti \u00fcht haruldast rauaisotoopi.<\/p>\n<p>Dominik Koll Dresdeni-Rossendorfi Helmholzi Keskusest ja ta kolleegid on hiljuti anal\u00fc\u00fcsinud ligi kolmesada kilogrammi s\u00fcgavalt Antarktika j\u00e4\u00e4kattest v\u00e4lja puuritud j\u00e4\u00e4d, mis oli tekkinud kauges minevikus, 81 000 kuni 40 000 aastat tagasi.<\/p>\n<p>Anal\u00fc\u00fcs n\u00e4itas, et j\u00e4\u00e4 sisaldas v\u00e4ga v\u00e4ikeses koguses raua isotoopi massiarvuga 60. Sellise raua aatomi tuumas on 26 prootonit, nagu raua aatomi tuumas ikka, aga tervelt 44 neutronit, mida on ebatavaliselt palju.<\/p>\n<p><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/www.europesays.com\/ee\/wp-content\/uploads\/2026\/05\/558447h58e7.png\"\/><\/p>\n<p>Selline raud on radioaktiivne ja muundub pikkam\u00f6\u00f6da koobaltiks. See t\u00e4hendab, et maakera pika ajaloo jooksul on sisuliselt kogu niisugune raud, mis siin algselt v\u00f5is olla, \u00e4ra muundunud, ja k\u00f5ik, mida n\u00e4eme, on \u00fclisuure t\u00f5en\u00e4osusega saabunud suhteliselt hiljuti kosmosest.<\/p>\n<p>Kosmoses tekib raud-60 peamiselt supernoovaplahvatustes ja seda v\u00f5ib sisalduda t\u00e4htedevahelistes pilvedes, mis on endasse muu hulgas ka supernoovadest ainet ammutanud.<\/p>\n<p>Koll ja ta kaaslased kirjutavad ajakirjas <a href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/nxjq-jwgp\" target=\"_blank\" rel=\"noopener nofollow\">Physical Review Letters<\/a>, et nende praegu uuritud mitmek\u00fcmne tuhande aasta vanustes proovides sisaldub raud-60 m\u00e4rkimisv\u00e4\u00e4rselt v\u00e4hem kui uuemast ajast p\u00e4rit proovides, mida on v\u00f5etud ja anal\u00fc\u00fcsitud varem.<\/p>\n<p>Natuke v\u00e4hem raud-60 sisaldada v\u00f5iksid vanemad proovid k\u00fcll juba sel p\u00f5hjusel, et seda muundub aegam\u00f6\u00f6da koobaltiks, aga vanemate ja uute proovide sisaldusvahe on nii suur, et tuleb arvata, et millalgi viimaste k\u00fcmnete tuhandete aastate jooksul on seda rauaisotoopi hakanud kosmosest Maale tulema suuremas koguses.<\/p>\n<p>Just see asjaolu aga toetabki h\u00e4sti arusaama, et Maa ja kogu muu P\u00e4ikeses\u00fcsteem on sisenenud raud-60 sisaldavasse t\u00e4htedevahelisse pilve.<\/p>\n<p>Millal t\u00e4pselt sisenemine toimus, praeguseist andmeist ei n\u00e4htu. Aga m\u00f5ned juba varem tehtud arvutimudelid osutavad, et P\u00e4ikeses\u00fcsteem v\u00e4ljub sest t\u00e4htedevahelisest pilvest 2000 kuni 6000 aasta p\u00e4rast.<\/p>\n<p>Teadusuudised on Vikerraadios eetris esmasp\u00e4evast reedeni ca kell 8.35 ja laup\u00e4eval ca kell 8.25.<\/p>\n","protected":false},"excerpt":{"rendered":"P\u00e4ikeses\u00fcsteem liigub praegu koos Maakera ja meie k\u00f5igiga l\u00e4bi h\u00f5reda t\u00e4htedevahelise pilve, ja Saksa teadlased on saanud sellele&hellip;\n","protected":false},"author":2,"featured_media":181716,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[18],"tags":[27222,37,33,35,34,36,80515,80516,24698,159,158],"class_list":["post-181715","post","type-post","status-publish","format-standard","has-post-thumbnail","category-sport","tag-antarktika","tag-ee","tag-eesti","tag-eesti-keel","tag-estonia","tag-estonian","tag-isotoop","tag-kosmiline-pilv","tag-raud","tag-sport","tag-sports"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ee\/116600388239367828","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/181715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/comments?post=181715"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/181715\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media\/181716"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media?parent=181715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/categories?post=181715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/tags?post=181715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}