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  Wikipedia: Protoplanetary disc

Wikipedia: Protoplanetary disc
Protoplanetary disc
From Wikipedia, the free encyclopedia.

A protoplanetary disc (proplyd) is a disc of dust and gas which orbits a protostar, within a solar nebula. Such discs eventually condense into either asteroid belts, moonss, or planets.

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From Wikipedia, the free encyclopedia. 
Modified by Geona