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Periodic features in Saturn's F ring Previous : evidence for nearby moonletsDepartment of Theoretical and Applied Mechanics, and Department of Astronomy, Cornell University, pandora cost bracelet Ithaca, New York 14853, USACenter for Radar Astronomy, pandora bracelet sale Stanford University, Palo Alto, California 94305, USAaddress Lunar and Planetary Laboratory, University of Arizona, Tucson.
Arizona 85712, USATHE Voyager 1 and 2 spacecraft1,2 found that the F ring of Saturn contains a remarkable diversity of features, bracelet pandora price from kinks and clumps to the so called braids, with typical longitudinal spacings estimated to range from 5,000 to 13,000 km. Because any nearby satellite perturbing a narrow ring should produce periodic features of charms pandora sale a single wavelength3 the F ring's 'shepherd' satellites, Prometheus and Pandora, have been suspected to cause the observed periodicities.
To test this simple idea, we have now examined a selection of the best available Voyager images of Saturn's F ring by applying a fast Fourier transform technique to azimuthal profiles from spacecraft ring images. Only a few distinct periodic signals, including one due to the inner shepherd, are visible. We suggest that these periodic signatures provide evidence for so far undiscovered satellites next to this puzzling ring.
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