Konstantin Tsiolkovskij

Konstantin Tsiolkovskij was a Russian mathematician and engineer who made significant contributions to the field of rocketry and space exploration. He was born on September 25, 1857, in Izmailovo, Russia. Tsiolkovskij is considered one of the founders of modern rocketry and is credited with developing the first multi-stage rocket. He was also a pioneer in the field of space exploration and advocated for the use of rockets to reach the moon and other planets.