Sullivan launched on Challenger's STS-41G, the first shuttle mission to carry two women astronauts, Sullivan and Sally Ride.
On October 5, 1984, Kathryn Sullivan launched into space for the first time as a mission specialist aboard Space Shuttle Challenger on mission STS-41G, lifting off from Kennedy Space Center in Florida.
This mission was historic because it marked the first time two women flew together in space: Sullivan and fellow astronaut Sally Ride, America's first woman in space. Their joint presence on the mission represented a significant milestone in NASA's ongoing efforts to diversify its astronaut corps, following the selection of the first astronaut class to include women in 1978.
STS-41G was a scientifically rich mission, carrying the Earth Radiation Budget Satellite and conducting numerous scientific experiments related to Earth observation, oceanography, and remote sensing—fields well-matched to Sullivan's academic background in geology and oceanography.
The mission also carried Marc Garneau, Canada's first astronaut, adding another layer of historic significance. Sullivan's participation on this flight set the stage for her subsequent, even more famous achievement just days later: becoming the first American woman to perform a spacewalk. The mission as a whole exemplified NASA's gradual, deliberate progress toward equal representation of women in every facet of spaceflight, from mission specialists to commanders.