Comet Orbits - Comet Orbits-Oort Cloud and Kuiper Belt...

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Comet Orbits---Oort Cloud and Kuiper Belt Comets can be divided into two basic groups depending on their orbital periods. There are long period comets with orbital periods that can be thousands to millions of years long, and short period comets with orbital periods less than about 200 years. Their alignments with the plane of the planet orbits is also different. The long period comet orbits are oriented in all different random angles while the short period comets orbits are within about 30 degrees of the solar system plane. These orbital characteristics point to two regions beyond the realm of the planets: the Oort Cloud and the Kuiper Belt. Kuiper Belt Using the observed characteristics of the short period comet orbits, the Dutch-American astronomer Gerard Kuiper proposed the existence of a disk of 100's of millions of comets from 30 to 100 or more A.U. from the Sun orbiting roughly along the ecliptic. This belt of comets, called the Kuiper Belt , was first observed in 1992. Comets originally from the Kuiper Belt that
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Comet Orbits - Comet Orbits-Oort Cloud and Kuiper Belt...

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