Tags: Artificialsatellite, Satellite.
STS-41-B was the tenth NASA Space Shuttle mission and the fourth flight of the Space Shuttle Challenger. It launched on February 3 1984 and landed on February 11 after deploying two communications satellites. It was also notable for including the first untethered spacewalk.Following STS-9 the flight numbering system for the Space Shuttle program was changed.
