Three different spacecraft have confirmed there is water on the Moon. It hasn’t been found in deep dark craters or hidden underground. Data indicate that water exists diffusely across the moon as hydroxyl or water molecules — or both — adhering to the surface in low concentrations. Additionally, there may be a water cycle in which the molecules are broken down and reformulated over a two week cycle, which is the length of a lunar day. This does not constitute ice sheets or frozen lakes: the amounts of water in a given location on the Moon aren’t much more than what is found in a desert here on Earth. But there’s more water on the Moon than originally thought.
“Scientists thought they knew fairly accurately what the surface of the moon was like and these results show that they didn’t – or at least not completely,” said Dr. Chris Welch, astronautics and space systems expert at Kingston University in London. “Finding so much more water could make living on the moon much easier in the future…If there is water on the moon – in whatever form – then we have a potential reservoir that could be used for drinking or to make into hydrogen and oxygen which could be used as rocket propellant. Also, of course, we could use the oxygen to breathe.”
There are potentially two types of water on the moon: exogenic, meaning water from outside sources, such as comets striking the moon’s surface, and endogenic, meaning water that originates on the moon. The M3 research team, which includes Larry Taylor of the University of Tennessee, Knoxville, suspect that the water they’re seeing in the moon’s surface is endogenic.