What is a planet?
A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
Expert answered|jasbro|Points 140|
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Asked 1/12/2011 8:26:07 PM
Updated 4/15/2014 10:03:15 AM
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