PUBLIC INFORMATION OFFICE 
JET PROPULSION LABORATORY 
CALIFORNIA INSTITUTE OF TECHNOLOGY 
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 
PASADENA, CALIFORNIA 91109. Telephone (2l3) 354-5011 
  
PHOTO CAPTION                       (TOP)          P-23264C
                                                   S-1-64 C 
                                                   Jan. 8, 1981 
  
Special computer processing was used to enhance subtle color and
brightness variations in this photo of Saturn's satellite, Rhea,
taken by Voyager 1 on Nov. 12, 1980, at a distance of 1.3 million
kilometers (808,000 miles). Rhea's surface is composed mostly of
ice, so is very reflective, and presents an almost uniformly
white appearance. Of particular interest to Voyager scientists are the
bright streaks that can be seen crossing Rhea's face. Scientists
believe the streaks may be caused by fresh ice ejected from beneath
the satellite's surface. Voyager 1 made its closest approach to
Saturn Nov. 12, 1980, and is now en route out of the solar system.
Voyager 2 will make its closest approach to Saturn Aug. 25, 1981,
and will then continue toward an encounter with Uranus in January
1986. The Voyager Project is managed for NASA by the Jet Propulsion
Laboratory, Pasadena, California.
  
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