This Russian scientist headed the Soviet space program for many years. Kerim Kerimov Yuri Gagarin Sergey Korolyov Mario Vostok

Sergey Korolyov

Korolyov was in charge of systems engineering for Soviet launch vehicles and spacecraft. He led the design, testing, construction, and launching of various spacecraft and was also in charge of the Soviet spaceflight program. His role was only revealed after his death

Sergey Krorlyov