Valentina Vladimirovna Tereshkova is a Russian engineer, politician, and former Soviet cosmonaut. She was the first woman in space, having flown a solo mission on Vostok 6 on 16 June 1963. She orbited the Earth 48 times, spent almost three days in space, is the only woman to have been on a solo space mission and is the last surviving Vostok programme cosmonaut. Twenty-six years old at the time of her spaceflight, she remains the youngest woman to have flown in space under the international definition of 100 km altitude, and the youngest woman to fly in Earth orbit.
Before her selection for the Soviet space programme, Tereshkova was a textile factory worker and an amateur skydiver. She joined the Air Force as part of the Cosmonaut Corps and was commissioned as an officer after completing her training. After the dissolution of the first group of female cosmonauts in 1969, Tereshkova remained in the space programme as a cosmonaut instructor. She later graduated from the Zhukovsky Air Force Engineering Academy and re-qualified for spaceflight, but never went to space again.