A veteran of multiple space shuttle flights, Sally Ride was the first American woman and the youngest American astronaut to be launched into space. A physicist by training, her post-NASA career included working for the Stanford University Center for International Security and Arms Control and as Director of the California Space Institute. Ride wrote or co-wrote five books on space aimed at children, with the goal of encouraging children to study science. She was the president and CEO of Sally Ride Science, a company she co-founded in 2001 that creates entertaining science programs and publications for upper elementary and middle school students, with a particular focus on girls. A private person, she did not publicly acknowledge her 27-year relationship with her life partner Tam O’Shaughnessy until her death. Her sister Bear Ride is a Presbyterian minister and has been active as a leader with More Light Presbyterians.