Meteorites bring water The latest information suggests that Earth's water came from Meteorites . The Moon was also bombarded by Meteorites and yet it has no water. Is this because it lacks an atmosphere and its water was lost in space ?

On further thought on this matter, it occurred to me that Mars has an atmosphere and yet it has no oceans either, just like the Moon . So Mars I assume was bombarded by meteorites, just like the Earth was and it has a stronger gravity than the Moon, yet it doesn't have oceans either ? So what happened ?
It would have to be a big meteorite to supply the quantaties we have here and therefore support the nuclear break down theory.ie- hydrogen to helium etc.

In respect of delivery by cosmic objects, the atmospheric pressure on the moon would result in a low boiling point and the evaporation velocity(due to low gravitational attraction) would exceed the escape velocity of the moon and meet with no atmospheric resistance.
This is the way I see it.
The body of water, although spread over the surface, would consider itself as an independent body and have its own "existence parameters" with regards to its environment.

The ability of Mars to retain water vapour is much reduced by its lower gravitational strength and atmospheric density. Can water exist at these parameters continuously, the evidence shows not.