Hyperion's sponge-like appearance

@article{Thomas2007HyperionsSA,
  title={Hyperion's sponge-like appearance},
  author={P. Thomas and J. Armstrong and S. Asmar and J. Burns and T. Denk and B. Giese and P. Helfenstein and L. Iess and T. V. Johnson and A. Mcewen and L. Nicolaisen and C. Porco and N. Rappaport and J. Richardson and L. Somenzi and P. Tortora and E. Turtle and J. Veverka},
  journal={Nature},
  year={2007},
  volume={448},
  pages={50-56}
}
Hyperion is Saturn’s largest known irregularly shaped satellite and the only moon observed to undergo chaotic rotation. Previous work has identified Hyperion’s surface as distinct from other small icy objects but left the causes unsettled. Here we report high-resolution images that reveal a unique sponge-like appearance at scales of a few kilometres. Mapping shows a high surface density of relatively well-preserved craters two to ten kilometres across. We have also determined Hyperion’s size… Expand
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