Crew Commander Ronald J. Grabe Pilot Steven S. Oswald Mission Specialists Norman E. Thagard William F. Readdy David C. Hilmers Payload Specialists Roberta L. Bonder Ulf D. Merbold Design Depicts the orbiter with the Spacelab module aboard. The spacecraft is oriented in a quiescent, tail-to-Earth, gravity-gradient attitude to best support the various microgravity payloads and experiments. The international composition of the crew is depicted by symbols representing Canada and the European Space Agency. The number 42 is represented by six white stars --- four on one side of the orbiter and two on the other. The single gold star above Earth's horizon honors the memory of astronaut Manley L. (Sonny) Carter Blue letters set against white give the surnames of the five astronauts and two payload specialists for the flight. Designed by the crew Fourteenth Discovery flight. Launch Date: January 22, 1992 The International Microgravity Laboratory (ML-1) studied the effects of microgravity on living organisms and materials processes. Landed January 30, 1992 at Edwards Air Force Base, Ca. Mission Duration: 193 hours 15 minutes 49 seconds.