this just in from NASA--3d Ganymede

[P3D Peter Abrahams <telscope@xxxxxxxxxx>]

Date: Wed, 4 Sep 1996 16:12:03 -0400
     NASA's Galileo spacecraft will snap three-dimensional 
pictures of giant, icy fissures and look for further evidence 
of a magnetic field when it dives past Jupiter's moon 
Ganymede at 3 p.m. EDT on Friday, September 6.
     During the flyby, Galileo will collect new pictures of 
two regions on Ganymede, Uruk Sulcus and Galileo Regio, that 
were imaged during the spacecraft's first flyby in late June.  
This will allow scientists to create stereo image pairs 
offering a three-dimensional view of Ganymede's icy terrain.
     "The areas on Ganymede that we saw during the first 
flyby have huge contrasts of light and dark that fool the 
eye," said Galileo Project Scientist Dr. Torrence Johnson of 
NASA's Jet Propulsion Laboratory (JPL), Pasadena, CA.  "What 
your eye interprets as a slope may not really be one.  These 
3-D views will give us a better idea of what is 'paint' on 
Ganymede's surface, so to speak, versus what is real 
topography."  In particular, Johnson said, scientists are 
eager to understand better the patterns of fissures and 
cracks that riddle the moon's surface.
     Data from most of the science instruments will be stored 
on Galileo's onboard tape recorder and transmitted to Earth 
from September 8 through November 2. 
     Additional information on the Galileo mission and its 
results can be found on the World Wide Web at:
             http://www.jpl.nasa.gov/galileo
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  Peter Abrahams    telscope@xxxxxxxxxx
the history of the telescope, the microscope,
   and the prism binocular


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