Universe

part.23. Oort Cloud The Mysterious Boundary of Our Solar System


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Far beyond the route of Neptune, beyond the Kuiper Belt and the scattered fragment, lies a vast and mysterious realm — an nearly fabulous boundary marking the edge of our solar system. This region is known as the Oort Cloud, a globular shell of icy objects believed to compass the Sun at a distance between 2,000 and 100,000 astronomical units( AU).

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