From http://www.jpl.nasa.gov/galileo/
   
                                 Mosaic of Io
                                       
   
   
   NOTE: This JPEG image is made available in order to share with the
   public the excitement of new discoveries being made via the NASA/JPL
   Galileo spacecraft. Galileo scientists are in the process of
   calibrating and validating this data. The full digital image necessary
   for scientific analysis will be released within one year of receipt of
   this orbit's last data.
   
   This image is available only on the WWW; it is not available in
   hardcopy or other forms.
   
   
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Mosaic of Io

   
   
   Mosaic of images of Io acquired during orbit C3, showing more than
   half of Io's surface. These are the best images available to show
   topographic features over most of this region. The map projection is
   called Simple Cylindrical, and the grid lines mark 10 degree intervals
   of latitude and longitude.
   
   The mosaic covers an area of about 8 million square kilometers, and
   the finest details that can discerned are about 2.5 kilometers in
   size. North is to the top of the picture and the sun illuminates the
   surface from the left. The images which form this mosaic were obtained
   through the clear filter of the Solid State Imaging (CCD) system
   aboard NASA's Galileo spacecraft on Nov. 6, 1996 (Universal Time) at a
   range which varied from 245,719 kilometers to 403,100 kilometers.
   
   Launched in October 1989, Galileo entered orbit around Jupiter on
   December 7, 1995. The spacecraft's mission is to conduct detailed
   studies of the giant planet, its largest moons and the Jovian magnetic
   environment. The Jet Propulsion Laboratory, Pasadena, CA manages the
   mission for NASA's Office of Space Science, Washington, DC.
   
   This image and other images and data received from Galileo are posted
   on the World Wide Web, on the Galileo mission home page at URL
   http://www.jpl.nasa.gov/galileo.