This slide rule belonged to Dr. Sally K. Ride. Before pocket-sized electronic calculators became available in the 1970s, slide rules were used as an aid to complex mathematical operations. Ride used this device as a university student taking courses in physics and astrophysics. Sally Ride became the first American woman in space when she flew on the STS-7 shuttle mission in 1983. Her second and last space mission was STS-41G in 1984.

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Size: 6283px × 2399px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No

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