Who was a notable figure in advancing rocket technology in the Soviet Union?

Sergei Korolev was instrumental in advancing rocket technology in the Soviet Union and played a pivotal role in the early space program. As the chief designer and leading figure behind many of the Soviet Union's early space missions, Korolev's work laid the groundwork for the successful launch of the world's first satellite, Sputnik, and the first human spaceflight, which was accomplished by Yuri Gagarin. His innovative designs and engineering expertise were critical in developing the R-7 rocket and other space vehicles that propelled the Soviet space program to the forefront of global aerospace efforts during the Cold War. Korolev's vision and leadership helped establish the Soviet space program as a major force in aerospace technology, making him a key figure in the history of rocketry.