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Moons at Work
Posted on Monday, February 4, 2013
Uploaded by
Waspie_Dwarf
Image credit: NASA/JPL-Caltech/Space Science Institute
Uploader comment: The ring-region Saturnian moons Prometheus and Pan are both caught "herding" their respective rings in this image. Through their gravitational disturbances of nearby ring particles, one moon maintains a gap in the outer A ring and the other helps keep a ring narrowly confined.
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