From http://www.jpl.nasa.gov/galileo/


                         Image of Ionian Volcano Pele
                                       
   
   
   NOTE: This 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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   These frames detail the changes around Pele on Jupiter's moon Io, as
   seen by Voyager 1 (left), Voyager 2 (middle), and Galileo (right). The
   Voyager frames were taken in 1979 when the two spacecraft flew past
   Jupiter and its moon Io. The Galileo view was obtained in June, 1996.
   Note the changes in the shape of the deposits further from the vent
   while the radial dark features closer to the vent show little change.
   The Voyager images use orange, blue, and violet filters. The Galileo
   image uses the green and violet filters of the Solid State Imaging
   system aboard the Galileo spacecraft and a synthetic blue. All three
   images are in a simple cylindrical projection and are approximately
   1700 km x 1500 km. North is to the top.
   
   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. Background information and
   educational context for the images can be found at URL
   http://www.jpl.nasa.gov/galileo/sepo.