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NOVA scienceNOW: Saving Hubble
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Program Overview
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Scientists describe the risky, high-stakes repairs on the Hubble
Space Telescope scheduled for fall 2008.
This NOVA scienceNOW segment:
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recounts how the Hubble Space Telescope has revolutionized
astrophysics and brought spectacular views of the universe to
the public, making it the best-known scientific instrument in
the world.
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states that several of Hubble's instruments no longer work.
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explains that a shuttle mission is scheduled to repair the
telescope. Two teams of astronaut spacewalkers will replace
batteries, install cameras, and remove old optics. A crucial job
involves repairing the power supply for the main camera.
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describes the complex, dangerous repair mission. Much of the
repair work is delicate, akin to surgery. Yet astronauts will be
wearing spacesuits and thick gloves and working in weightless
conditions.
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details that repairing the main camera involves removing 32 tiny
screws that hold a protective cover plate with edges so sharp
that it can cut a spacesuit. If a spacesuit depressurizes, it
would kill the astronaut wearing it.
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describes how astronauts practice on a mock Hubble telescope
that sits in a huge pool of water called a neutral buoyancy
tank. The tank simulates the repair experience, enabling
astronauts to practice making detailed repairs while wearing
bulky pressurized suits.
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points out that no amount of practice will guarantee that the
Hubble repairs will be made effectively or safely.
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concludes that the project will likely lead to great discoveries
in the future.
Taping Rights: Can be used up to one year after the program
is taped off the air.
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