'U.S. may follow up
Voyager with study
of Jupiter's satellites
PASADENA, Calif. (UPI) The United States plans
t6ifollow up Project Voyager's spectacular exploration
of Jupiter by launching an even more advanced
spacecraft in 1982 to e make 11 close encounters with the
~ planet's four largest moons.
‘ t4 The spacecraft, named Galileo after the Italian
astronomer who discovered the four big satellites, also
Will send an instrumented probe into Jupiter's turbulent
atmosphere and swing into orbit around the planet for
the first time. '
'"Galileo is an attempt to achieve an enormously
diVersified follow-up exploration and • analysis of
ilt •
•J Jupiter," said Bruce A. Murray, director of the Jet
Propulsion Laboratory which is controlling Voyagers 1
arid 2 and building Galileo.
Murray said Galileo's orbit around Jupiter is being
d6igned so each time it swings close by the moons 10,
Eui•opa, Callisto and Ganymede it will receive an assist
ft:om their gravity, whipping it on to the next satellite. It
kill do this 11 times. .
it also will swing way out and then back in to study
Jupiter's radiation and magnetic forces.
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"It is intended, if all this works, for the price of one
spacecraft to get definitive chemical information on
Jupiter's atmosphere, a complete mapping of the
satellites and a thorough mapping and understanding of
these mysterious radiation belts and magnetic fields,"
Murray said in an interview.
Galileo is the only new space agency planetary
mission now in the works. But Murray hopes President
Carter's budget office and Congress will give the
National Aeronautics and Space Administration
authority next year to begin work on a return mission to
Venus.
The proposal is to launch in 1984 a spacecraft that will
carry into Venusian orbit an advanced radar system
that will peer through the planet's cloud blanket and
produce a detailed topographic map of the planets's
entire surface.
"That to me is a benchmark mission 'that's got to
happen," Murray said. "It's hard for me to believe that
this will be turned down as either being uninteresting or
unworthy."
Murray said another worthwhile mission up for ap-
120 West College 237-4350
proval next year will be a project to send a robot
spacecraft to shoot a probe into Haley's comet in 1986
and fly on to rendezvous with the comet Tempel 2.
There are no plans, however, to follow up exploration
of the two most closely examined extraterrestrial
bodies in the solar system Earth's moon and Mars.
NASA tried unsuccessfully for two years to get White
House approval to start a modest project to place an
unmanned .reconnaissance satellite into orbit around
the moon's poles to study regions not explored by the
Apollo manned landing missions.
And there does not appear to be much interest among
the government's budget officials for a program to
follow the Viking robbt landings on Mars. ,
"With the strangeness of the place that Mars is, and
with its variety of land forms that really are
fascinating, and with pretty strong evidence of climatic
history cycling, I can't believe it's going to be permitted
to remain dormant for too long," Murray said. "But
right now it is."
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