They then replaced that box with one from the shuttle Endeavour.
The current mission, the inaugural flight of the shuttle Endeavour, seemed made for the manned space program.
In late 2012, the center received the Space Shuttle Endeavour.
She became the first black woman in space aboard the shuttle Endeavour in September 1992.
Tonight the astronauts began the mission's fifth space walk to complete work on the telescope, anchored in the cargo bay of the shuttle Endeavour.
In a later test, however, the new point sensor box failed, and so engineers replaced it with the box from the shuttle Endeavour.
Two astronauts stepped outside the shuttle Endeavour early today to practice orbital construction techniques 200 miles above Earth.
Corrective optics were installed last month by space-walking astronauts of the shuttle Endeavour.
The first signs of trouble with pressure spikes appeared as the shuttle Endeavour was blasting into orbit in January.
Inaugural planners had hoped that the astronauts aboard the shuttle Endeavour, scheduled to be launched this week, would chime in.
