The Oort cloud

Details The Oort cloud The Oort cloud

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.344..825w&link_type=abstract

Nature (ISSN 0028-0836), vol. 344, April 26, 1990, p. 825-830. Research supported by NASA.

Computer Science

54

Comet Nuclei, Oort Cloud, Pluto (Planet), Solar Corona, Solar Gravitation, Center Of Gravity, Orbit Perturbation, Planetary Systems

Scientific paper

Although the outermost planet, Pluto, is 6 x 10 to the 9th km from the sun, the sun's gravitational sphere of influence extends much further, out to about 2 x 10 to the 13th km. This space is occupied by the Oort cloud, comprising 10 to the 12th-10 to the 13th cometary nuclei, formed in the primordial solar nebula. Observations and computer modeling 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.

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