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Unformatted text preview: Comets and asteroids are leftover planetesimals. The Solar wind cleared the leftover gas, but not the leftover planetesimals. Asteroids are rocky because they formed inside the frostline. Comets are icy because they formed outside the frostline There were many more leftover planetesimals than we see today. Most of them collided with the newly-formed planets & moons during the first few 108 years of the Solar System. We call this the heavy bombardment period....
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This note was uploaded on 09/12/2011 for the course AST 2002 taught by Professor Britt during the Spring '08 term at University of Central Florida.
- Spring '08