Images of Neptune's ring arcs obtained by a ground-based telescope

  title={Images of Neptune's ring arcs obtained by a ground-based telescope},
  author={B. Sicardy and F. Roddier and C. Roddier and E. Perozzi and J. Graves and O. Guyon and M. Northcott},
Neptune has a collection of incomplete narrow rings, known as ring arcs, which should in isolation be destroyed by differential motion in a matter of months. Yet since first discovered by stellar occultations in 1984, they appear to have persisted, perhaps through a gravitational resonance effect involving the satellite Galatea. Here we report ground-based observations of the ring arcs, obtained using an adaptive optics system. Our data, and those obtained using the Hubble Space Telescope… Expand

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