Soviet cosmonaut Vladimir Komarov was the first from his country to fly into space twice. He died when his Soyuz 1 capsule crashed while re-entering the Earth, due to a parachute failure, on April 24, 1967, which made him the first human to die in a space flight.
Sergei Korolev was a Soviet spacecraft designer and rocket engineer who played an important role during the Space Race between the Soviet Union and the United States of America in the 1950s and 1960s. He was largely responsible for developing the R-7 Rocket and launching Yuri Gagarin into space. Sergei Korolev also launched Belka, Strelka, and Laika into space.
Konstantin Tsiolkovsky was a Russian rocket scientist. Credited with pioneering astronautic theory, Tsiolkovsky is widely regarded as one of the founding fathers of astronautics and modern rocketry. His works served as an inspiration to several other Soviet rocket engineers like Valentin Glushko and Sergei Korolev. Hence, Konstantin Tsiolkovsky's work played an influential role in the Soviet space program.
Part of a Soviet boy scout during World War II, cosmonaut Konstantin Feoktistov narrowly escaped death in the hands of Germans at 16. He later became part of the world’s first multi-manned spacecraft, Voskhod 1. As an engineer, he designed the Salyut and Mir space stations.