The following 10 images document the most significant discoveries of the Galileo mission.
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A Detailed View of Callisto's Surface
This mosaic of two images shows an area within the Valhalla region on Jupiter's moon
Callisto and illustrates one of the most significant discoveries of Galileo. There is an unexpected
absence of small craters and clear evidence in the ragged rims of the craters of an erosion process
that is believed to be due to sublimation of volatiles from the surface ice. North is to the top of
the mosaic and the Sun illuminates the surface from the left. The mosaic covers an area
approximately 33 kilometers (20 miles) across. Scientists believe Valhalla is the result of a large
impact early in the history of Callisto. The Solid State Imaging System aboard NASA's Galileo
spacecraft obtained these images on November 4, 1996.
TRT -
Supers - Video courtesy of NASA
Center Contact - DC Agle, 818/393-9011
HQ Contact - Donald Savage, 202/358-1727
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