A Day in Astronomy: Sally Ride and Valentina Tereshkova

Credit: The San Diego Union

On this day in 1983, astronaut Sally Ride became the first American woman in space, traveling aboard the shuttle Challenger. And 20 years earlier on the same date, Russian cosmonaut Valentina Tereshkova, the first Russian female in space, returned to Earth aboard Vostok 6, after orbiting the planet 48 times. She still remains the only woman to travel into space on a solo mission.

Image (Credit): Cosmonaut Valentina Tereshkova (New Mexico Museum of Space History)