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protoplanet
protoplanet A body presumed to have formed in the early history of the Solar System, from which the major planets grew. Protoplanets are believed to have formed from the aggregation of planetesimals. They eventually became the major planets by sweeping up other bodies that crossed their orbits, in a process of accretion.
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"protoplanet." A Dictionary of Astronomy. 1997. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. "protoplanet." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O80-protoplanet.html "protoplanet." A Dictionary of Astronomy. 1997. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-protoplanet.html |
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protoplanet
protoplanet An individual condensation, representing a very small proportion of the total cloud mass but of similar composition, that occurs during the condensation of an interstellar cloud, from which stars and planets are assumed to have originated. See PROTOSTAR.
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AILSA ALLABY and MICHAEL ALLABY. "protoplanet." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "protoplanet." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-protoplanet.html AILSA ALLABY and MICHAEL ALLABY. "protoplanet." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-protoplanet.html |
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