Last modified on 27 June 2003.

Encyclopædia Galactica

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A large body that orbits a star. Planets do not emit light on their own (but reflect light of their star). A planet may consist of rock and metals, like the inner planets of Solar System, or or gases and liqiuds, like the gas giants of Solar System. There is a class of so called brown dwarf stars in the border area of biggest gas giant planets and smallest stars that can not clearly be classified as either.

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Created by Rami T. F. Rekola