STS-41-F
Encyclopedia
STS-41-F was a planned Space Shuttle
Space Shuttle
The Space Shuttle was a manned orbital rocket and spacecraft system operated by NASA on 135 missions from 1981 to 2011. The system combined rocket launch, orbital spacecraft, and re-entry spaceplane with modular add-ons...

 mission that was to have been flown by the , however it was canceled due to payload delays. This would have been the maiden flight of Discovery. Because of the cancellation, STS-41-D
STS-41-D
STS-41-D was the first flight of NASA's Space Shuttle orbiter Discovery. It was the 12th mission of the Space Shuttle program, and was launched from Kennedy Space Center, Florida, on 30 August 1984...

later became the first flight of Discovery.
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