I buy into the idea that the Earth's Moon was formed by a giant
impact of a roughly Mars-sized planet with the Earth. If Earth
already had one or more moons before the impact, what most
likely happened to them? Did they immediately become part of
the Moon? Did they collide with the Moon much later, forming
some of the maria? Were they thrown out of Earth's orbit into
independant orbits around the Sun, where they might still be
orbiting as asteroids?

-- Jeff, in Minneapolis

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http://www.FreeMars.org/jeff/

"I find astronomy very interesting, but I wouldn't if I thought we
were just going to sit here and look." -- "Van Rijn"

"The other planets? Well, they just happen to be there, but the
point of rockets is to explore them!" -- Kai Yeves