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What is a planetesimal?
Planetesimal - one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system.
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Asked 1/12/2011 8:31:13 PM
Updated 4/15/2014 10:11:16 AM
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Edited by selymi [4/15/2014 10:11:12 AM]
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A small body of rock and/or ice, under 10 kms (6 miles) across, formed during the early stages of the solar system. Planetesimals are the building blocks of planets, but many never combined to form large bodies. Asteroids are one example of planetesimals
Added 1/12/2011 8:59:08 PM
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