PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
Contact: Stephanie R. Zeluck
FOR IMMEDIATE RELEASEDecember 10, 1997
GALILEO MISSION TO JUPITER TO BE EXPLORED IN JPL EVENING TALK
"The Galileo Mission: Jupiter and its Moons Revealed" will
be the theme for a free public lecture at 7 p.m. on Thursday,
Dec.18, in JPL's von Karman Auditorium. Seating is limited and
will be on a first come, first-served basis.
The lecture will be presented by Bill O' Neil, project
manager of the Galileo Primary Mission. Employed at JPL since
1963, O'Neil has served on a number of space flight missions
including the lunar Surveyor mission, the 1971 Mariner mission to
Mars and the Viking mission to Mars. He also was manager of the
JPL Mission Design Department and the Galileo Science and Mission
Design before being appointed Galileo project manager in 1990.
On Dec. 7, 1995, the Galileo spacecraft entered orbit around
Jupiter after a six-year journey and deployed its scientific
probe into the planet's gaseous depths. It was the first time a
spacecraft had entered orbit around an outer planet and the first
time a probe had been deployed to penetrate an outer planet's
The Galileo spacecraft has now spent more than two years in
orbit around Jupiter, studying the giant planet and its moons Io,
Ganymede, Europa and Callisto. Observations made by Galileo of
the Jovian system have included:
Galileo is now in the second phase of its mission, called
the Galileo Europa Mission (GEM), the main objectives of which
are to conduct a detailed study of Europa over 14 months, then
plunge repeatedly through the Io plasma torus to reach the
volcanic moon Io. This talk will summarize Galileo's scientific
findings to date and provide an overview of the Europa mission
scheduled to continue through 1999.
- Jupiter: a dynamic climate of wet and dry regions and auroras
in its atmosphere.
- Io: massive volcanic eruptions and an ionosphere.
- Europa: a metallic core; ice rafts hinting at the possibility
of a liquid ocean lying underneath; an atmosphere.
- Callisto: no core but hints of an atmosphere.
- Ganymede: a magnetosphere, magnetic field and metallic core;
strong tectonic processes.
This lecture is part of the von Karman Lecture Series held
monthly by the JPL Public Information Office. A web site on the
lecture series is located at http://www.jpl.nasa.gov/lecture. For
directions and other information, call the Public Information
Office at (818) 354-5011.