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To: Father Terrence who wrote (32163)8/25/2000 4:21:20 PM
From: TigerPaw  Read Replies (1) | Respond to of 769667
 
More likely it was a planetoid that was captured by Earth's gravitation eons ago.

How can one planet capture another without collision, or without a third body involved to change the momentum? What's the odds of a three way close encounter of just the right counterbalancing forces?

TP



To: Father Terrence who wrote (32163)8/26/2000 2:30:38 AM
From: Krowbar  Read Replies (1) | Respond to of 769667
 
FT, I think that the consensus among scientists is that the moon was torn from the Earth by a collision from an asteroid. It probably isn't a captured asteroid because they are usually irregular in shape. Either way, it happened billions of years ago, as shown by it having spent it's rotational energy in the friction of tidal forces, as is apparent in it's same side always facing the Earth, with nary a side to side wiggle.

Del