Solar System Collisions
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[ Teens/Mature Teens ] - See what would happen if a comet or asteroid hit the Earth or another planet.
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Planetary Society
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[ Teens/Mature Teens ] - Pictures & descriptions of famous asteroids, comets, and impact craters.
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Welcome to the Planets: Small Bodies
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[ Teens/Mature Teens ] - Contains pictures & brief descriptions of smaller bodies in the universe such as asteroids & comets.
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