Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984s%26t....68..511c&link_type=abstract
Sky and Telescope (ISSN 0037-6604), vol. 68, Dec. 1984, p. 511-515.
Astronomy and Astrophysics
Astronomy
6
Jupiter Rings, Natural Satellites, Planetary Evolution, Saturn Rings, Uranus Rings, Morphology, Planetary Composition, Planetology, Spaceborne Astronomy
Scientific paper
The ring systems of Jupiter, Saturn and Uranus have been studied particularly since the Voyager flights, in order to obtain more information on the rings' origin and structure. These ring systems all have satellites but the structure and number of satellites are different. Jupiter, with its two satellites, has a ring that is roughly 6000 km wide while Uranus has nine ringlets, most of which are no wider than tens of kilometers and which are separated by empty space. The three planetary ring systems also show distinctions in composition; for example, the rings of Saturn are thought to be icy while Jupiter's consist mostly of rocky material. The effect that countless particles, which make up each ring and interact with each other through collisions and gravitational attractions, have on the system's energy and angular momentum has been discussed. Spiral density waves and spiral bending waves, are explained by the resonance theory. Further study is needed in this area since the resonance theory does not account for all observed ring structures.
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