Landscape Comparisons -- Galilean Satellites
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Landscape Comparisons -- Galilean Satellites

September 26, 2003
Each time NASA's Galileo spacecraft orbits the planet Jupiter, it encounters one of the four Galilean satellites. From left to right in this mosaic, the moons shown are Io, Europa, Ganymede, and Callisto. Throughout the eleven orbits in Galileo's nominal mission the Solid State Imaging (CCD) system builds up views of the satellite surfaces in different colors and at varying spatial resolutions. The top row displays the correct relative sizes of the satellites in global views. In these relatively low resolution images the smallest features that can be seen are about 20 kilometers in size. These views show how the surfaces have been affected on the largest scales by either tectonic or volcanic changes in the interiors of the moons or by deposition from the exterior environment.

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