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The University of Chicago News Office
Contact: Steve Koppes
(773) 702-8366
s-koppes{at}uchicago.edu

University of Chicago scientist participates in three Mars missions
being launched this month

June 5, 2003

University of Chicago physicist Thanasis Economou is involved in all
three missions that will be launched to Mars this month by the
National Aeronautics and Space Administration and the European Space
Agency.  He already was involved in the operation of two scientific
instruments en route to Saturn and comet Wild-2.

Launched on June 2 was the European Mars Express mission. Mars
Express, an orbiter, includes the British-led Beagle 2 lander, which
will carry a chemical analysis instrument. Economou, a Senior
Scientist at the University of Chicago's Enrico Fermi Institute,
serves as a consultant to the chemical analysis instrument's science
team.

NASA will launch two Mars Exploration Rover missions on Sunday, June
8 and Wednesday, June 25. Economou is a member of the science team
for both missions. Each rover is equipped with chemical sensors that
use a technique invented at the University of Chicago. The Alpha
Particle X-Ray Spectrometer instruments are similar to the one for
which Economou provided the X-ray spectrometer portion of the rover
that explored the Mars Pathfinder landing site in 1997.

Another instrument that Economou operates is the University's dust
detector, which is aboard NASA's Stardust space probe. That
instrument will measure the dust density around Wild-2 when Stardust
flies within 93 miles of the comet in January 2004. A similar
instrument on the Cassini space probe will collect data on dust
particles as that spacecraft crosses Saturn's famous rings. Cassini
will enter Saturn's orbit in July 2004.

The Chicago dust-detection instruments for Stardust and Cassini were
designed, developed and built by Anthony Tuzzolino, Senior Scientist
in the Enrico Fermi Institute, and the late John Simpson, the Arthur
Holly Compton Distinguished Service Professor Emeritus in Physics.

To arrange an interview with Economou, call Steve Koppes at (773)
702-8366.

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