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Comet

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  1. a small Solar System body that orbits the Sun and, when close enough to the Sun, exhibits a visible coma (atmosphere) or a tail — both primarily from the effects of solar radiation upon the comet's nucleus

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 8, 2008
  2. nuclei are themselves loose collections of ice, dust and small rocky particles, measuring a few kilometres or tens of kilometres across

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 8, 2008
  3. have a variety of different orbital periods, ranging from a few years, to hundreds of thousands of years, while some are believed to pass through the inner Solar System only once before being thrown out into interstellar space

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 8, 2008
  4. Long-period comets are believed to originate at a very much greater distance from the Sun, in a cloud (the Oort cloud) consisting of debris left over from the condensation of the solar nebula

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 8, 2008
  5. Short-period comets are thought to originate in the Kuiper Belt, or associated scattered disc, which lie beyond the orbit of Neptune

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 8, 2008
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