A belt of moonlets in Saturn’s A ring

@article{Sremcevic2007ABO,
  title={A belt of moonlets in Saturn’s A ring},
  author={Miodrag Sremčević and J{\"u}rgen Schmidt and Heikki Salo and M. Sei{\ss} and Frank Spahn and Nicole Albers},
  journal={Nature},
  year={2007},
  volume={449},
  pages={1019-1021}
}
The origin and evolution of planetary rings is one of the prominent unsolved problems of planetary sciences, with direct implications for planet-forming processes in pre-planetary disks. The recent detection of four propeller-shaped features in Saturn’s A ring proved the presence of large boulder-sized moonlets in the rings. Their existence favours ring creation in a catastrophic disruption of an icy satellite rather than a co-genetic origin with Saturn, because bodies of this size are unlikely… 

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