Saturn moon Dione, in the foreground of this image from NASA Cassini spacecraft, appears darker than the moon Tethys. Tethys appears brighter because it has a higher albedo than Dione, meaning Tethys reflects more sunlight.
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Details
Title: Tethys and Darker Dione
Creator: NASA/JPL/Space Science Institute
Date Created: 2010-06-30
Rights: JPL
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