Pandora prevents the f ring from spreading outward

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Unformatted text preview: d the beginning of the E Ring. The E Ring is the outermost ring, and is extremely wide. It is a difuse disk consisting mostly of ice. Unlike the other rings, it is composed of microscopic particles. In 2005, the source of the E Ring's material was determined to be cryovolcanic plumes emanating from the south polar region of the moon Enceladus. GravitaTonal effects of small moons sculpt Saturn’s rings NASA/JPL/Space Science Institute Two small moons, Prometheus and Pandora, “shepherd” the F-ring NASA/JPL/Space Science Institute The 20-km wide moon Pan clears the Encke gap 36 Prometheus and Pandora orbit just inside and outside of Saturn’s F ring. Pandora prevents the F ring from spreading outward and Prometheus prevents it from spreading inward. Recent closeup images from the Cassini probe show that the F Ring consists of one core ring and a spiral strand around it. Prometheus is followed by dark channels that it has carved into the inner strands of the ring. The Encke Gap is a 325-kilometer-wide gap within the A Ring, centered at a distance of 133,590 kilometers from Saturn's center. It is caused by the presence of the small moon Pan, which orbits within it. Images from the Cassini probe have shown that there are at least three thin, knotted ringlets within the ga...
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This note was uploaded on 10/23/2013 for the course ASTR 100 taught by Professor Dunne during the Fall '12 term at University of Illinois, Urbana Champaign.

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