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Smooth crater floor
NASA posted pics (new to me) on the 10th. Look under Dawn in missions.
The floor of the crater that hosts the bright spots is noticeably smoother than any other nearby crater floors. Probably because previous ?water erupting from the bright spots ?springs/geysers has covered the floor hiding any subsequent impact craters and in turn has been covered by dust/debri or otherwise degraded/aged to a dull shade. A bit like the smoother basalt flows Maria on our moon. Also means the bright spots have some longevity.
Note also the deformed shapes of many of the craters including the bright spots one. This is a tectonically active world, and again I wonder what is the mechanism ?heat source.
wotcha reckon, L
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