Doesn't this instability problem just show that the moon couldn't have already been there before the collision? The preearth and heaven would have been stable, right? But any other body in the system would have had the unstable orbit.

Seems to me there are two options:
1) The moon was already there before the collision
2) The moon appeared after the collision

1) has the instability problem for the moon meaning it wouldn't have survived.
2) means throwing away the collision theory for moon formation, because that would have destroyed the continents, at least most of them.


Last edited by kallog; 09/01/11 03:17 PM.