bifröst: Surface of Callisto, photographed by Galileo, 25th June 1997. I believe this image is centred around 36°W on the Callistine* equator, which would place it just to the south-east of the gigantic Valhalla Crater. The sinuous linear features visible at right, then, are a section of the concentric troughs that surround Valhalla, apparently caused by the impact. Image credit: NASA/JPL/UoA. * If you consult any qualified authority, they will tell you that the appropriate adjective for Callisto is “Callistoan”, “Callistonian” or perhaps “Callistan”. If you want to believe them over me, feel free.

bifröst: Surface of Callisto, photographed by Galileo, 25th June 1997.

I believe this image is centred around 36°W on the Callistine* equator, which would place it just to the south-east of the gigantic Valhalla Crater. The sinuous linear features visible at right, then, are a section of the concentric troughs that surround Valhalla, apparently caused by the impact.

Image credit: NASA/JPL/UoA.

* If you consult any qualified authority, they will tell you that the appropriate adjective for Callisto is “Callistoan”, “Callistonian” or perhaps “Callistan”. If you want to believe them over me, feel free.

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October 29, 2012 - 1:58pm
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