The Proton (Прото́н) rocket (formal designation: UR-500, also known as D-1/ D-1e or SL-12/SL-13) is a Russian unmanned space vehicle design, first launched in 1965. It is still in use as of 2015 for both commercial and government launches. This makes it one of the most successful heavy boosters in the history of spaceflight. All Protons launch from Baikonur Cosmodrome in Kazakhstan.
The name "Proton" originates from a series of large scientific satellites, which were among the rocket's first payloads. The enormous capacity of the new rocket allowed the heavy materials used in particle detectors. Thus the Proton satellites were pioneers of high-energy astronomy. Like many Soviet boosters, the name of the recurring payloads became associated with their launchers.
Payloads can be fitted with either a Blok D or Briz-M upper stage. Launch capacity to low Earth orbit is about 22 tonnes (44,000 lbm). Interplanetary transfer capacity is about 5–6 tonnes (11,000–13,000 lbm).
Valentina Vladimirovna Tereshkova (Russian: Валенти́на Влади́мировна Терешко́ва) (born 6 March 1937) is the first woman in space, now a retired Sovietcosmonaut. Out of more than four hundred applicants and then out of five finalists, she was selected to pilot Vostok 6 on 16 June 1963 and become the first woman to fly in space. This also made her the first civilian in space (she was only honorarily inducted into the USSR's Air Force as a condition on joining the Cosmonaut Corps). On this mission, lasting almost three days in space, she performed various tests on herself to collect data on the female body's reaction to spaceflight.
Before being recruited as a cosmonaut, Tereshkova was a textile-factory assembly worker and an amateur parachutist. After the female cosmonaut group was dissolved in 1969, she became a prominent member of the Communist Party of the Soviet Union, holding various political offices. After the collapse of the Soviet Union, she retired from politics and remains revered as a hero in Russia.