OFFICE OF PUBLIC INFORMATION JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PASADENA, CALIFORNIA. TELEPHONE (818) 354-5011 PHOTO CAPTION Voyager 2-21 P-22749 C July 8, 1979
Voyager 2 obtained this photograph of Ganymede, the largest satellite of Jupiter, on July 2, 1979 from a distance of 6 million kilometers (4 million miles). The side of the satellite shown is approxiately the same as that photographed at close range by Voyager 1 in March. This picture illustrates well the light, bluish regions near the north and sourh poles. It is known that these polar caps are composed of a light covering of water ice or frost. Voyager 2 will pass within 63,000 kilometers (39,000 miles) of Ganymede at about midnight July 8 on its way toward the giant planet.
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