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Fórum ExoSpace.cz • Zobrazit téma - Vědci z NASA: Led na Měsíci existuje
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Vědci z NASA: Led na Měsíci existuje

PříspěvekNapsal: 23. srp 2018, 08:08
od Petr Valach
Tým vědců NASA pod vedením Shuaia Liho z University of Hawaii a Brown University našel přímé důkazy o existenci ledu na povrchu Měsíce. Led se nachází na pólech našeho satelitu, v nejchladnějších a nejtmavějších místech. Nejvíce ledu se nachází v kráterech kolem jižního pólu, zatímco na severním je ho o poznání méně. Teploty v místech nálezu nikdy neměly přesáhnout –160 °C a vlivem velmi nízkého sklonu osy rotace Měsíce se tam nikdy nedostalo ani sluneční světlo.

Předchozí pozorování zaznamenalo nepřímé důkazy povrchového ledu na jižním pólu, ale tyto nálezy mohly být vysvětleny jinými jevy, jako je třeba nezvykle reflexní měsíční půda. Přístroj NASA Moon Mineralogy Mapper (M3) na palubě indické sondy Chandrayaan-1, která okolo Měsíce operovala v roce 2008, dokázal přímo změřit absorpci infračerveného záření molekulami vody, a tedy i určit, v jaké fázi (pára, kapalina, led) se voda vyskytuje.

Závěry byly zveřejněny ve sborníku Národní akademie věd 20. srpna 2018.



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