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Pioneer Images of Ganymede
was launched in March 1972 and flew through the Jovian system in December
1973. Pioneer 11 was launched in April 1973 and flew by Jupiter and its
moon in December 1974.
These are the best images of Ganymede taken by Pioneer 10 and 11.
Spacecraft: Pioneer 10
Date: December 1973
image shows a surface of contrasting light and darks spots on the surface.
Spacecraft: Pioneer 11
Date: December 2, 1974
Distance from Ganymede: 459,000 miles (739,000 km)
Photo Number: C5-1/2
The left image is a color composite taken by Pioneer 11, the right image is
the same image enhanced by computer processing. The pixel resolution is
These images show very
little color variation, but there is substantial albedo differences over
the satellite's disk.
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