The Moon used to be part of Earth eons ago untill something smashed into
Earth and the debrie became our Moon,the Moon is gradually moving away
from Earth.There is a resonable chance there is Oxygen and Hydrogen on
the Moon to make Water.Earth used to have Rings around Earth.
cuhulin

Actually, the origin of the moon is still something of a mystery. It
is sufficiently different from earth to not necessarily be a chunk of
earth. It also has no significant atmosphere, so water in liquid or
vapor form escapes to space quickly. Solid ice is more likely endure,
although even this will eventually sublimate in the absence of an
atmosphere with some relative humidity.

Frozen water (ice) was tentatively discovered just below the surface of
the moon in an isolated crater near one of its poles a few years ago.
This crater, unlike most of the moon's surface, never receives warming
solar radiation, and the solid ice could theoretically persist there
longer than elsewhere on the lunar surface.

"Making" water from components is quite another issue. It takes a
great deal of energy plus the two main components (O and H) in the
right proportions to get meaningful water creation; and, it takes a
*whole bunch* of gaseous O and H to make a little bit of liquid water.

Interestingly, there are a few animals, such as desert kangaroo rats,
who are able to manufacture water in their bodies from the nonliquid
foods they find in the desert.

Bruce Jensen