The Microgravity Science Laboratory-1 Spacelab module is lowered into the payload bay of the Space Shuttle orbiter Columbia in Orbiter Processing Facility 1.

The Microgravity Science Laboratory-1 (MSL-1) Spacelab module is lowered into the payload bay of the Space Shuttle orbiter Columbia in Orbiter Processing Facility 1. During the scheduled 16-day STS-83 mission, the MSL-1 will be used to test some of the hardware, facilities and procedures that are planned for use on the International Space Station while the flight crew conducts combustion, protein crystal growth and materials processing experiments