Split comets and the origin of crater chains on Ganymede and Callisto

@article{Melosh1993SplitCA,
  title={Split comets and the origin of crater chains on Ganymede and Callisto},
  author={H. Jay Melosh and Paul M. Schenk},
  journal={Nature},
  year={1993},
  volume={365},
  pages={731-733}
}
WHEN the Voyager 1 spacecraft flew through the jovian system in January 1979, it returned images of several prominent chains of impact craters on the surface of the moon Callisto (Fig. 1). These impressively straight chains, or catenae, are composed of between 4 and 25 craters, and are up to 620 km long. They were initially thought to be secondary craters produced by debris from a larger primary impact1, but detailed searches for source craters have been largely unsuccessful: a satisfactory… Expand
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It is shown that catena-producing craters likely formed in the gravity regime, providing constraints on the ejecta velocity field and knowledge of source crater material properties, and for the first time across any planetary body, creates a novel way to probe planetary surface characteristics. Expand
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