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Guest 05.09.2011 05:26

Определение планеты
 
A planet is a body that directly orbits a star, is large enough to be round because of self gravity, and is not so large that it triggers nuclear fusion in its interior. A major planet is a planet that is more massive than the total mass of all of the other bodies in a similar orbit. Besides major planets there could be trojan planets and belt member planets.


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