Physics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988em%26p...42..209r&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 42, Sept. 1988, p. 209-220.
Physics
Planetary Gravitation, Planetary Rings, Roche Limit, Coagulation, Granular Materials, Kinetic Theory, Radio Waves, Shear Strength, Tensile Strength
Scientific paper
The physical characteristics of the rings of Saturn, Uranus, Neptune, and Jupiter are discussed. It is suggested that the rings may be composed of particles held in contact by their mutual gravitation without relative motion. Each part of the ringlet orbits as if it were a separate particle, with all parts constrained to the same orbit by their contacts. It is found that the stability of this configuration is dependent on the density of the ringlet. This model is used to explain observations including the sharp edges of the rings, a long life for the system, the possible existence of a partial ring, the asymmetry of brightness of Saturn ring A, and the forward scattering of radio waves.
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