Rugged Rhea

IR/G/UV color-composite of Rhea

Here’s a color-composite image of Rhea, made from raw images acquired by Cassini during a flyby on March 10, 2012. The color is derived from images taken in infrared, green and ultraviolet light.

Rhea is Saturn’s second-largest moon after Titan, but at 950 miles across (compared to 3,200!) Rhea is less than a third Titan’s diameter. Its high reflectivity is a result of its mainly being composed of water ice, which is harder than rock is on Earth at Rhea’s frigid temperatures of -300º F. Even colder than sister moons Dione and Tethys, Rhea is perhaps the most extensively cratered world in the solar system.

Credit: NASA/JPL/SSI. Edited by J. Major.


  1. Awesome photo. Cassini has returned some truly stunning images. I still remember Voyager 1 & 2 🙂


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