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Astronomy Picture of the Day
A Tether in Space
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#70801
by
[z]Barbara Harris
@
29.03.2005 00:00
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A Tether in Space
Explanation: One of the greatest unrequited legends of outer space is the tether.
Tethers
, long strands of material, hold the
promise
of
stabilizing satellites
,
generating electricity
, and allowing
easy transportation
. Possibly the most
extreme vision
of the space tether is the
space elevator
popularized by
Arthur C. Clarke
, where a
tether is constructed
that connects the ground to
geosynchronous orbit
. One
problem
is strength - it is difficult to make a long useful tether that does not snap. To help realize more of the tremendous potential of
space tethers
, NASA and the
SpaceWard Foundation
have issued the
Centennial Tether Challenge
, promising a monetary reward for the
best space tether
that exceeds a minimum standard.
Pictured above
is the deployment of the
Tethered Satellite System 1
(TSS-1) by the
space shuttle Altantis
in 1992. Like other tested tethers,
TSS-1 failed
to live up to its promise, although many
valuable lessons
were learned.
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