The Bruce Murray Space Image Library
de Pater et al. 2006
The inner parts of the ring systems are very different: Saturn's is broad and opaque, while Uranus' inner rings are very narrow. But two new rings of Uranus discovered in 2003, the inner "R2" and outer "R1" show similarities in color and relative position to Saturn's G and E rings, respectively. Saturn's blue E ring is thought to come from a moon, Enceladus, buried within it. Uranus' R2 ring is also blue and also has a moon, Mab, buried within it -- but Mab is far, far smaller than Enceladus.
Original image data dated on or about January 1, 2006
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