Valentina Tereshkova

Valentina Vladimirovna Tereshkova (born 6 March 1937) is a retired Soviet cosmonaut and engineer, and the first woman to have flown in space, having been selected from more than four hundred applicants and five finalists to pilot Vostok 6 on 16 June 1963. In order to join the Cosmonaut Corps, Tereshkova was only honorarily inducted into the Soviet Air Force and thus she also became the first civilian to fly in space.

The spacecraft was launched on June 16, 1963. Data was collected on the female body's reaction to spaceflight. Like other cosmonauts on Vostok missions, she maintained a flight log, took photographs, and manually oriented the spacecraft. Her photographs of the horizon from space were later used to identify aerosol layers within the atmosphere. The mission, a joint flight with Vostok 5, was originally conceived as being a joint mission with two Vostoks each carrying a female cosmonaut, but this changed as the Vostok program experienced cutbacks as a precursor to the retooling of the program into the Voskhod program. Vostok 6 was the last flight of a Vostok 3KA spacecraft.

It was revealed in 2004 that an error in the control program made the spaceship ascend from orbit instead of descending. Tereshkova noticed the fault on the first day of the flight and reported it to Sergey Korolev. The mistake was promptly repaired. Tereshkova entered the data that she got from the Earth into the descent program and landed safely.

By request of Soviet spaceship designer Sergey Korolev, Tereshkova kept the problem secret for dozens of years.