While the cloud tops of Uranus proved to be rather featureless, the surface of Miranda , the innermost of Uranus ' large moons, showed several interesting features. Voyager 2 passed closer to Miranda than to any Solar System body and hence photographed it with the clearest resolution. Miranda's heavily cratered terrain shows grooves like Jupiter 's moon Ganymede and several valleys and cliffs. Miranda is made of a roughly equal mix of ice and rock. Miranda was discovered by Gerard Kuiper in 1948.
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