•Water on the Moon is the water found on the surface of the Moon. Liquid water cannot remain on the Moon’s surface and water vapor is quickly lost into space by the Sun’s radiation. There are two potential sources of water on the Moon: water-bearing comets and other objects that impact the Moon, and in situ production. The latter is theorized to be produced in small amounts by the chemical combination of hydrogen ions (protons) in the solar wind with oxygen atoms in the Moon’s minerals (oxides, silicates, etc.), forming water or its possible precursors, hydroxyl groups, trapped in a crystal lattice.
Uncertain evidence of the presence of liquid water on the Moon has been found in various models that assume the presence of bound hydrogen. Moon scientists have been debating the possibility of water deposits for decades. Now, they write in a report that they are “confident that the decades-long debate is over.” “There is water on the Moon everywhere, not just in minerals, but in fragmented form on the surface and possibly in the form of ice blocks or slabs deep underground.”
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