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Mission or Study ID:   STS-41G
Shuttle Program
Launch/Start Date:
Landing/End Date:
8 days
STS-41G Crew Patch

STS-41G, launched on October 5, 1984, was the sixth flight of the Space Shuttle Challenger and the 13th Space Shuttle mission. On board were seven crewmembers, Commander Richard L. Crippen, Pilot Jon A. McBride, Mission Specialists Kathryn D. Sullivan, Sally K. Ride, and David C. Leestma, and Payload Specialists Marc Garneau and Paul D. Scully-Power. This crew was the largest flight crew ever to fly on a single spacecraft at that time. STS-41G was also the first flight to include two female astronauts, Sally Ride and Kathryn Sullivan. Astronaut Sullivan became the first American woman to walk in space, when she and astronaut David C. Leestma performed a 3-hour extravehicular activity (EVA) on October 11 demonstrating the Orbital Refueling System and proving the feasibility of refueling satellites in orbit.

The primary payload was the Earth Radiation Budget Satellite (ERBS), which was deployed from the payload bay by the Remote Manipulating System (RMS) arm. ERBS was the first of three planned satellites designed to measure the amount of energy received from the sun and reradiated into space. It also studied the seasonal movement of energy from the tropics to the polar regions.

Life sciences experiments performed during the STS-41G mission were those classified as Detailed Supplementary Objectives (DSOs). A DSO is a NASA-sponsored investigation performed by Space Shuttle crewmembers, who also serve as test subjects. These studies are designed to require minimal crew time, power and stowage. Biomedical DSOs focus on operational concerns, including space motion sickness, cardiovascular deconditioning, muscle loss, changes in coordination and balance strategies, radiation exposure, pharmacokinetics and changes in the body's biochemistry.

Other payloads included the Office of Space and Terrestrial Applications-3, Large Format Camera, Radiation Monitoring Equipment, Thermoluminescent Dosimeter, Auroral Photography Experiment, a package of Canadian experiments, IMAX camera, and eight Get Away Special experiments.

Challenger landed at Kennedy Space Center in Florida after a successful mission on October 13, 1984.

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