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PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

PHOTO CAPTION P-47065
July 10, 1996

A mixture of terrains studded with a large impact crater is shown
in this view of the Uruk Sulcus region of Jupiter's moon Ganymede
taken by NASA's Galileo spacecraft during its first flyby of the
planet-sized moon on June 27, 1996. The image shows fine details
of bright areas that make up about half of the surface of
Ganymede. Pock-marked, ancient, heavily cratered terrain is seen
at the top; it is cut by younger, line-like structures in the
lower left of the image. The bright, circular feature in the
lower middle is an impact crater with some dark ejecta
superimposed on the linear ridges. These types of relationships
revealed by Galileo allow scientists to work out the complex
geologic history of Ganymede. In this view, north is to the top
and the sun illuminates the surface from the lower left nearly
overhead. The area shown, at latitude 10 degrees north,
longitude 168 degrees west, is about 55 by 35 kilometers (34 by
25 miles), and the smallest features that can be seen are 74
meters in size. The image was taken on June 27 at a range of
7,448 kilometers (4.628 miles). The Jet Propulsion Laboratory
manages the Galileo mission for NASA's Office of Space Science.