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Space.com: More Moons Around Earth?
URL: http://www.space.com/scienceastronomy/solarsystem/second_moon_991029.html
Submitted: Sat Sep 06 2003
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CT: Solar System: Earth: Moon: Space.com: More Moons Around Earth?
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Description:
Article describing the asteroid Cruithne, and orbital motions at gravitational balance points in space that temporarily pull asteroids into Earth orbits.