an asteroid is at a distance 2000000km from the earth and is moving
with a speed of 10000m/s relative to the earth.  what is the closest
distance between the asteroid and the center of the earth (
6.37000000m for the raidus of the earth.  Does the asterio hit the
earth?  If not will it come back and threaten earth again?

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Clarification of Question by diala-ga on 20 Nov 2004 22:06 PST

I need an answer today.