|   | 
Credit:    
   
STS-51 Crew,   
NASA   
   
   
   
Explanation:
Astronaut Carl Walz waves at his colleagues from   
the aft end of   
the Space Shuttle Discovery's payload bay -   
during a 1993 spacewalk to evaluate tools, tethers, and a foot restraint   
slated for use in the   
first Hubble Space Telescope servicing mission.   
   
Today's successful launch of Discovery begins   
the second servicing mission to the Hubble.   
   
Discovery's crew will rendezvous with   
the orbiting telescope and capture   
it with the shuttle's manipulator arm.   
   
With Hubble in the payload bay   
the crew will conduct spacewalks to   
replace two existing instruments with new ones.   
To be installed are the   
Space Telescope Imaging Spectrograph and the   
Near Infrared Camera and Multi-Object Spectrometer.   
   
Other hardware will also be replaced and upgraded including   
the telescope's   
Fine Guidance Sensor.   
   
The improved instrumentation will extend   
the Hubble's ability to   
explore the distant Universe.   
   
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Based on Astronomy Picture
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Publications with keywords: space
Publications with words: space
See also:
