People of the Revolution and the USSR

Soviet Union Soviet communism 1907–1998 ○ Natural causes

Co-discoverer of spontaneous fission, a pillar of the Soviet atomic project

After they removed the neutron source, their ionization chamber kept firing. To rule out cosmic rays, they hauled the apparatus 50 meters underground into Moscow's Dinamo metro station, where the signal persisted: uranium fissions all by itself.

Soviet nuclear physicist. In 1940, together with Georgy Flyorov, he discovered the spontaneous fission of uranium-235, a finding that established the scientific foundation for the Soviet atomic bomb project. Drafted into the Red Army in 1941 and recalled to Kazan in 1942, he developed the associated-particle method for measuring neutron source yields and created express techniques for plutonium detection under Kurchatov. In 1947 he founded the neutron physics and nuclear fission laboratory at the Khlopin Radium Institute, which he led for nearly four decades, and in 1949 he established the nuclear physics department at the Lensovet Technological Institute, training generations of Soviet nuclear engineers.

Soviet Union Soviet communism 1912–2011 ○ Natural causes

Korolev's deputy who designed the brains of Sputnik and then wrote the history of the Soviet space program

On May 2, 1945, Major Boris Chertok scrawled his name on the walls of the fallen Reichstag — the moment he would forever call 'the happiest achievement of my life.' Three months later he was knee-deep in V-2 wreckage, opening the first page of the Soviet space program.

Korolev's closest deputy, he designed the guidance and control systems that steered Soviet rocketry for half a century — from the R-7 ICBM through Sputnik, Vostok, Soyuz, and Mir. A Hero of Socialist Labor (1961) and full member of the Russian Academy of Sciences, he published his four-volume memoir 'Rockets and People,' the definitive insider history of the Soviet space program, and kept writing until age 99.

Soviet Union Soviet communism 1914–1984 ○ Natural causes

The missile designer who overtook Korolev under Khrushchev's patronage, then faded when his patron fell

On March 8, 1958, Chelomey hired Nikita Khrushchev's son Sergei as an engineer at OKB-52. With that single hire, he gained a direct line to the Soviet leader — and over the next six years, backed by Khrushchev's patronage, he rose to the pinnacle of the Soviet space program, surpassing even Korolev.

A leading Soviet rocket and spacecraft designer, he headed OKB-52 (later NPO Mashinostroyeniya) and created the Proton launch vehicle, the UR-100 ICBM, the Almaz military space stations, and the TKS spacecraft. He chaired the Council of Chief Designers from 1961, succeeding Korolev (aided by Khrushchev's patronage, since Khrushchev's son Sergei worked under him). After Khrushchev's ouster, Ustinov sidelined him, and by 1981 his space programs were shut down. The Proton rocket still flies today; the UR-100 was the most mass-deployed ICBM in Soviet history.