Friday, 5 August 2011

Did Earth have two moons?

Some astronomers believe our moon had a smaller sibling for 80 million years — before it was destroyed in a violent collision The moon once had a smaller sibling, according to astronomers from the University of California, Santa Cruz. The researchers used computer models to simulate the size ...

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  • The Moon is Earth 's only known natural satellite the fifth largest satellite in the Solar System, and second only to Charon, a satellite of Pluto, in size relative to its ...

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