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The first two swaths collected by Cassini's Titan Radar Mapper were obtained in October of 2004 (Ta) and February of 2005 (T3). The Ta swath provides evidence for cryovolcanic processes, the possible occurrence of fluvial channels and lakes, and some tectonic activity. The T3 swath has extensive areas of dunes and two large impact craters. We interpret the brightness variations in much of the swaths...
Visible and near-infrared images of Io from the Galileo spacecraft reveal a surface more colorful than previously thought. Red, yellow, green, white, and black hues decorate the satellite, presumably caused by a varied composition of sulfur compounds and silicates. Almost a third of Io is covered by red and orange materials, particularly at polar latitudes above ±30°. These red regions were scarcely...
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