Adaugă-ne ca sursă preferată în Google
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O teorie larg acceptata sugereaza ca Luna s-a format in urma resturilor aruncate in spatiu, dupa ce un corp ceresc de marimea planetei Marte a lovit Pamantul in urma cu aproximativ 4,5 miliarde de ani. Dupa formare, a mai fost necesara o alta perioada de cateva milioane de ani pentru ca suprafata, acoperita de un strat subtire de roca topita, sa se solidifice. Bucata de mineral, adusa de astronautii care au participat la misiunea Apollo, a fost analizata si in trecut, insa metodele de datare folosite aveau erori mari. Studiul actual, bazat pe o tehnica de datare cu uraniu a impus o noua perspectiva asupra acestei chestiuni. Rezultatul, publicat in revista Nature Geoscience, este cat se poate de precis: varsta zirconiului este de 4,417 miliarde de ani, format cu 10 milioane de ani inaintea celui mai vechi zirconiu de pe Pamant. Descoperirea indica faptul ca suprafata Lunii s-a solidificat in mai putin de 100 de milioane de ani de la formarea ei.
Sursa: Science News
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