Valhalla (crater)

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Valhalla multiring structure (crater) on Callisto
Valhalla multiring structure (crater) on Callisto
The central part of Valhalla on Callisto. Bright knobs surrounded by smooth dark plains are visible.
The central part of Valhalla on Callisto. Bright knobs surrounded by smooth dark plains are visible.

Valhalla is the largest multi-ring structure impact crater on Jupiter's moon Callisto. It has a bright central region 600 km across, an inner ridge and through zone and striking concentric rings extending to a diameter of approximately 3,800 km around that[1]. The ring fracture system may have formed as semi-liquid material slumped towards the centre of the crater following the impact. The crater is named after Valhalla, Odin's hall in Norse mythology.

The central zone of Valhalla has a knobby structure, where bright knobs are surrounded by dark smooth plains.

[edit] References

  1. ^ Greeley, R.; Klemaszewski, J.E.;Wagner L.; et.al. (2000). "Galileo views of the geology of Callisto". Planetary and Space Science 48: 829-853. 
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