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Rendering of the International Space Station
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The Next Space Station
by Peter Tyson
It has been described as "the largest international scientific
and technological endeavor ever undertaken [which will light]
the pathway for peaceful cooperation between nations in the
21st century." It has also been described as a "colossally
expensive celestial turkey, for which no rational purpose has
been expressed by even its most enthusiastic supporters." Ever
since it was first proposed by U.S. President Ronald Reagan in
1984, the International Space Station (ISS) has attracted such
superlatives. Perhaps that's because it's a creature of
superlatives itself (see
A Station Second to None).
However you may perceive it, the ISS is a reality. On November
20, 1998, if all goes to plan, a Russian Proton rocket will
lift off from the Baikonur space base in Kazakhstan carrying
the first 20-ton module of a planned 520-ton space station.
Known as the Functional Cargo Block, or FGB for its Russian
acronym, this first module will serve as a power and
propulsion unit to keep the station's early components in
position. The FGB will be followed by Unity, a pressurized
module lofted aboard the Space Shuttle that will link with the
FGB and later with future components. Currently set for an
April 1999 lift-off, the Russian-built third element, the
prosaically named Service Module, will contain living
quarters, navigation and life-support systems, and rocket
boosters to periodically nudge the fledgling station back into
its proper orbit. Other Russian- and American-built modules
and solar panels will follow in the coming years.
The other 14 nations involved in the project will send up
their own contributions. Canada will provide a robotic arm to
help construct and maintain the station, while Japan will
build a lab module with a "back porch," where experiments can
be exposed to space. Italy—a member of the European
Space Agency, which is supplying a research module to be flown
aboard its Ariane V launch vehicle—is designing resupply
vessels to be flown aboard the Space Shuttle. These will bring
food, equipment, and new scientific experiments. Brazil, the
only developing country participating in the endeavor, is
creating a special optical window for the study of hurricanes,
deforestation, and other environmental phenomena on Earth.
Rendering of Space Station assembly.
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Though the ISS will not be finished until at least 2004, the
first crew will take up residence next July—again if all
goes to plan. The team includes American William M. Shepherd,
expedition commander, and Russians Yuri Gidzenko, Soyuz
vehicle commander, and Sergei Krikalev, flight engineer. Later
crews will alternate with a Russian commander and American
shuttle crews, and with still later teams welcoming astronauts
from the other 14 partner-nations.
Promoting international cooperation is just one of the many
goals the station's backers envision for this "orbiting
science institute," as NASA deems it. Foremost among them, of
course, is scientific research. Station crews will grow
protein crystals to help enhance drug design and research into
disease treatment, and conduct experiments to improve the
design of polymers and semiconductors. They will study the
growth of plants, which is essential for long space
habitation. (ISS proponents see the station, among other
things, as a stepping stone for manned exploration of Mars.)
Finally, they will serve as guinea pigs in a study of the
human response to long-duration exposure to zero-g.
Other goals are more ephemeral, as perhaps befits an
undertaking taking place in outer space. A NASA fact sheet
lists them succinctly:
-
inspire our children and encourage education
-
foster the next generation of scientists, engineers, and
entrepreneurs
- satisfy humanity's need to explore.
If the International Space Station can accomplish all that, it
may just live up to all those glowing superlatives.
A Station Second To None
Rank after the Moon and Venus in brightness in night sky when
complete: 1
Number of Boeing 747 passenger cabins its work and living
space will equal in size: 2
Approximate breadth when fully assembled, in football
stadiums: 1
Approximate weight when fully assembled, in pounds: 1
million
Maximum number of people who will be able to live on it at
once: 7
Longest planned stay for a single individual: 187 days
Gravitational force on it compared to that on Earth: 1
millionth
Speed at which it will orbit Earth: 18,000 mph
Time it will take to orbit Earth: 90 minutes
Miles above the Earth it will orbit: 250
Percentage of the Earth's surface it will be able to observe:
85
Year it was first proposed by President Ronald Reagan: 1984
Year by which he hoped to have it fully operational: 1994
Year it is currently slated to be fully operational: 2004
Rank in size of global scientific projects during peacetime:
1
Number of nations involved in its construction and operation:
16
Estimated number of jobs in Russia alone its design and
operation will provide: 100,000
Planned number of shuttle and rocket launches to construct:
45
Number of hours of spacewalks needed during construction:
1,729
Number of times which this figure exceeds all spacewalks ever
done: 2
Total estimated cost to develop and operate through the year
2027, according to the U.S. Government Accounting Office: $118
billion
Official minimum life expectancy: 10 years
Peter Tyson is Online Producer of NOVA.
Images: NASA
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| Updated November 2000
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