> In a message dated 7/12/01 9:27:25 AM, firstname.lastname@example.org writes:
> >But did Charon result from a collision like that that formed our moon?
> >Or was it simply a captured Kuiper Belt Object.... its really just a
> >hunk of ice.
> I don't know personally, but it's got an awfully circular orbit for a capture.
> They're both supposed to be just big KBOs, by current conventional wisdom.
Circularity is a function of time and tidal drag. Being ice, they are
more fluid, which acts to dampen out energy exchanges that could make
its orbit more oblong.
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