Global View of Io in various colors
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Global View of Io in various colors

September 26, 2003
These full disk views of Jupiter's volcanic moon, Io, use images which were acquired by NASA's Galileo spacecraft when Io, the spacecraft, and the sun were nearly all aligned (near zero degrees phase angle). This angle best shows color variations on the surface. The left frame is an enhanced color view combining images obtained with the near-infrared, green, and violet filters of Galileo's Solid State Imaging (CCD) system. The white areas are rich in sulfur dioxide frost. Yellow, brown, and red areas are rich in other sulfurous materials. The upper right frame combines the green, near-infrared, and one micrometer filters. The added information from the infrared part of the spectrum will help scientists characterize the type of volcanism that paints this active world.

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