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发帖数: 344 | 1 Io at Sunset
Credit: Galileo Project, JPL, NASA
Explanation: How tall are mountains on Jupiter's moon Io? One way to find
out is to view them at sunset. Tall structures facing the Sun are then better
-lit and cast long shadows. The above image highlights Mongibello Mons on
the far left, a sharp ridge rising so high it would rank among the highest
mountains on Earth. The violently changing surface of Io shows not only
classic volcano cinder cones but also many thrust faults where the ground
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