source of water on Moon discovered by Scientists

Posted by Unknown Rabu, 17 Oktober 2012 0 komentar

Scientists have discovered that the most likely source of water on Moon is the constant stream of charged particles from the Sun known as the solar wind.

The findings by researchers from the University of Michigan imply that ice inside permanently shadowed polar craters on the Moon, sometimes called cold traps, could contain hydrogen atoms ultimately derived from the solar wind.

Theoretical models of lunar water stability dating to the late 1970s suggest that hydrogen ions (protons) from the solar wind can combine with oxygen on the Moon's surface to form water and related compounds called hydroxyls, which consist of one atom of hydrogen and one of oxygen and are known as OH.

Researchers present infrared spectroscopy and mass spectrometry analyses of Apollo samples that reveal the presence of significant amounts of hydroxyl inside glasses formed in the lunar regolith by micrometeorite impacts.

"We found that the 'water' component, the hydroxyl, in the lunar regolith is mostly from solar wind implantation of protons, which locally combined with oxygen to form hydroxyls that moved into the interior of glasses by impact melting," said Youxue Zhang, Professor of Geological Sciences.

"Our work shows that the 'water' component, the hydroxyl, is widespread in lunar materials, although not in the form of ice or liquid water that can easily be used in a future manned lunar base," Zhang said in a statement.

"This also means that water likely exists on Mercury and on asteroids such as Vesta or Eros further within our solar system," Yang Liu of U-T, the first author of the paper said.
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Judul: source of water on Moon discovered by Scientists
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