alexa The Oort cloud
Physics

Physics

Journal of Astrophysics & Aerospace Technology

Author(s): PAUL R WEISSMAN

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Although the outermost planet, Pluto, is 6xl09km from the Sun, the Sun's gravitational sphere of influence extends much further, out to ~2x1013 km. This space is occupied by the Oort cloud, comprising 1012–1013 cometary nuclei, formed in the primordial solar nebula. Observations and computer modelling have contributed to a detailed understanding of the structure and dynamics of the cloud, which is thought to be the source of the long-period comets and possibly comet showers.

This article was published in Nature and referenced in Journal of Astrophysics & Aerospace Technology

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