Solar System

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Solar System Sun and all the celestial bodies that revolve around it: the nine planets, together with their satellites and ring systems, the thousands of asteroids and comets, meteoroids, and other interplanetary material. The boundaries of the Solar System lie beyond the orbit of Pluto to include the Kuiper Belt and the Oort Cloud of comets. The Solar System came into being nearly 5000 million years ago, probably as the end-product of a contracting cloud of interstellar gas and dust. See also Big Bang

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