We live in an almost 100% theoretical construct IMO adi-mac. Thank you for taking the time to post and ask for meaningful replies. For the record I do not put much stock in data released by NASA (never a straight answer) however I do not question that NASA has compiled volumes of data, the general population is just not privy to NASA's findings in its pure form. I do not know the source of our moon, if it is solid or hollow, or what the moon is actually made of. I know our planet could not have evolved to its current state without the moon in orbit so I am very grateful for the moon's existence. Consider picking up a copy of Knight and Butler's: Who Built The Moon, I have a feeling you will enjoy that read. I read it a while ago and can say I give moon theories some thought more days than not, especially when I look at the moon in the night, and sometimes daytime, sky. Keep searching adi-mac, makes the trip more enjoyable IMO. Best.