> backside of the moon

I think perhaps you mean the far side of the moon. The "backside" of the moon implies a large graben stretching almost from pole to pole, and I have seen no evidence of such a geological formation in any photos.

> the moon really is just a large rock

It really is surprising being able to see the Moon isn't spherical. (Are those abberations?) It makes sene, given the moon isn't in hydrostatic equilibrium.