How did water occur in moon? Here are some guesses...A stream of charged hydrogen ions carried from the sun by the solar wind. One possible scenario to explain the new finding of water on the lunar surface is that during the daytime, when the moon is exposed to the solar wind, hydrogen ions liberate oxygen from lunar minerals to form OH and H2O, which are then weakly held to the surface. At high temperatures (red-yellow) more molecules are released than adsorbed.
Aside from scientific interest, finding water on the moon could impact plans for eventual human settlements beyond Earth, said geologist Paul Spudis, with the Houston-based Lunar and Planetary Institute.
Scientists have suspected water could exist inside deep craters at the moon's poles that are never exposed to sunlight. The new research is surprising because it found chemical bonds between hydrogen and oxygen throughout the lunar surface. The concentrations appear denser near the polar regions.
How much water and hydroxyl is on the moon and where it came from remains a mystery.
But the quantity of water is negligible.If you filled a soda bottle with lunar soil, there would be about an eyedropper's worth of water.