[MrB]

I see your point, but you also have to consider that the moon has been struck many times and the material/mass stuck to it - so it has changed weight over time as well.

[Wuli]

“I see your point, but you also have to consider that the moon has been struck many times and the material/mass stuck to it - so it has changed weight over time as well.”

I agree and accept your point.

and given the article here:

http://www.space.com/3373-earth-moon-destined-disintegrate.html

I am left wondering if what you mention has contributed, over time, to what science says is a definite gradual change in the moon’s orbit, and if the answer to that question is “yes” then, in a reversal of my original concern, then whether or not human mining operations might counteract the affects of all the material being added to the moon constantly by asteriod strikes on it.