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The top documents tagged [period comets comets]
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period comets comets
Chapter 28.4 Asteroids, Comets & Meteoroids Std 1f: Know the evidence for the dramatic effects that asteroid impacts have had in shaping the surface of.
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PTYS/ASTR 206Meteorites/Comets 4/27/06 Comets and Kuiper Belt Objects.
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