
Most
astronomers can only dream of discovering previously unknown stars,
galaxies and asteroids that may be on a collision course with
Earth. Thanks to a space telescope being designed by Utah State's
Space Dynamics Lab, NASA scientists will be able to map the universe
in unprecedented detail with infrared detectors that are 500,000
times more sensitive than previous sensors.
SDL
deputy director Harry Ames says, "With an instrument of this
high a resolution, we'll be able to look deeper into space and
further back in time than ever before."
SDL
has three years to build the $40-million telescope for NASA's
unmanned satellite, WISE. The mission, scheduled to launch in
2008, will scan the entire sky in infrared light in search of
nearby stars that were too dim to be detected before, planetary
construction zones, and the brightest, most distant galaxies in
the universe.
The
survey will reveal hundreds of failed stars, or brown dwarfs,
some of which may lie closer to the sun than what is currently
believed to be the closest, Alpha Centauri.
As
it scans the cosmos, WISE will assemble an atlas of targets for
the James Webb Space Telescope to explore when it is launched
as the replacement to the Hubble Telescope. "Hubble was looking
at one deer antler in a herd of deer on the hillside," says
Ames. "We're going to be looking at the whole deer, and maybe
two or three deer next to him."
Peter
Eisenhardt, project scientist for the mission at NASA's Jet Propulsion
Laboratory in Pasadena, California, says, "This mission will
complete the basic reconnaissance of the universe in mid-infrared
wavelengths, providing a vast storehouse of knowledge that will
endure for decades."
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