SPACE PHOTOS THIS WEEK: Thousand-Ruby Galaxy, More

SPACE PHOTOS THIS WEEK: Thousand-Ruby Galaxy, More
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August 27, 2008--The history of past Martian climates may lie buried at the planet's poles.

This HiRISE image, taken July 20, shows angular unconformities found in layered deposits near Mars's north pole.

The features can be seen where visible layers appear to be cut off, as observed right of center and at bottom center.

Angular unconformities evidence missing pieces of the red planet's complex geological record, where layers have eroded in places later covered by new material.
—Image by NASA/JPL/University of Arizona
 
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