The 54th flight of the Space Shuttle will be devoted primarily to Germany for conducting a wide range of experiments in the microgravity environment of space flight.
Columbia, the flagship of the ... Shuttle fleet, will make its 14th voyage into Earth orbit carrying a crew of seven, including two German payload specialists. STS-55's primary payload is Spacelab D2, for the second Shuttle mission dedicated to Germany. Spacelab D1 was flown in 1985. Spacelab is a self-contained, space-based research laboratory carried inside the Shuttle's 60- foot-long cargo bay.
[Summary provided by NASA]