Asteroids, comets, and meteoroids are small solar system bodies composed of rock and ice. They are believed to be debris left over from the formation of our solar system about four and a half billion years ago. While relatively small in size compared to the planets, these small bodies have participated significantly in shaping the surfaces of all solid bodies in the solar system. The study of these objects is called meteoritics.
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Last modified by pib on May 12, 2009.