Mark Hess
Headquarters, Washington, D.C.                                     
December 6, 1991
(Phone:  202/453-4164)

Barbara Schwartz
Johnson Space Center, Houston
(Phone:  713/483-5111)


RELEASE:  91-201

Payload Crew Named for Spacelab Life Sciences-2 Mission 


   Two additional NASA astronauts and three payload 
specialists have been named as payload crew for the Spacelab 
Life Sciences-2 mission, STS-58, set for launch in mid 1993.

   Joining Payload Commander Rhea Seddon, M.D., as mission 
specialists are three-time space flight veteran Shannon Lucid, 
Ph.D., and David Wolf, M.D., astronaut class of 1990.

   Named as payload specialist candidates for the 7-day flight 
aboard Columbia are Jay Buckey, M.D. , an assistant professor 
at the University of Texas, Southwestern Medical Center, 
Dallas; Martin J. Fettman, D.V.M., an associate professor, 
Colorado State University, Fort Collins; and Laurence Young, 
Sc.D., professor and Director, Man-Vehicle Laboratory, 
Massachusetts Institute of Technology, Cambridge.

   After further training and evaluation, one of the payload 
specialist candiates will be selected to fly as the prime 
payloads specialist and the others will support the mission 
from the ground as backups.

   The SLS-2 mission will be the second Shuttle Spacelab 
mission dedicated to the investigation of the effects of 
microgravity on human physiology.  SLS-1, flown in June of 
this year, was the first such Spacelab mission.  Life sciences 
experiments and flight techniques developed on missions such 
as SLS-2 are precursors for research that will be done on 
Space Station Freedom.  These investigations are crucial if 
humans are to live and work in space safely and effectively. 

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