Some close observers have even ventured to account for her craters by saying they were due to pelting showers of meteoric rain.

Then again as to her atmosphere--why should she have lost her atmosphere?
Why should it sink into craters?
Atmosphere is gas, great in volume, small in matter; where would there be room for it?
Solidified by the intense cold?
Possibly in the night time.

But would not the heat of the long day be great enough to thaw it back again?
The same trouble attends the alleged disappearance of the water.

Swallowed up in the cavernous cracks, it is said.

But why are there cracks?
Cooling is not always attended by cracking.