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Outermost Moon

This is the best spacecraft-acquired image of Uranus' outermost moon Oberon. Several large impact craters, surrounded by bright rays, are visible in this view. Near the center of Oberon's disk is a large crater with a bright central peak and a floor partially covered with black material. This may be icy, carbon-rich material that spilled onto the crater floor sometime after the crater formed. Another striking feature is a large mountain, about 6 km (4 mi) high, peeking out on the lower left limb.

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