The confinement of Neptune's ring arcs by the moon Galatea
@article{Namouni2002TheCO, title={The confinement of Neptune's ring arcs by the moon Galatea}, author={F Namouni and Carolyn C. Porco}, journal={Nature}, year={2002}, volume={417}, pages={45-47} }
Neptune has five narrow ring arcs, spanning about 40 degrees in longitude, which are apparently confined against the rapid azimuthal and radial spreading that normally results from inter-particle collisions. A gravitational resonance based on the vertical motion of the nearby neptunian moon Galatea was proposed to explain the trapping of the ring particles into a sequence of arcs. But recent observations have indicated that the arcs are away from the resonance, leaving their stability again…
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