Sally Kristen Ride (May 26, 1951 – July 23, 2012) was an American physicist and astronaut.
Born in Los Angeles, she joined NASA in 1978 and became the first American woman in space in 1983. She remains the youngest American astronaut to have traveled to space, having done so at the age of 32. After flying twice on the Orbiter Challenger, she left NASA in 1987. She worked for two years at Stanford University’s Center for International Security and Arms Control, then at the University of California, San Diego as a professor of physics, primarily researching nonlinear optics and Thomson scattering. She served on the committees that investigated the Challenger and Columbia space shuttle disasters, the only person to participate on both.
On June 18, 1983, she became the first American woman in space as a crew member on space shuttle Challenger for STS-7. She was preceded by two Soviet women, Valentina Tereshkova in 1963 and Svetlana Savitskaya in 1982. The five-person crew of the STS-7 mission deployed two communications satellites and conducted pharmaceutical experiments. Ride was the first woman to use the robot arm in space and the first to use the arm to retrieve a satellite.