Buzz Aldrin is an American astronaut, engineer and fighter pilot.
Konstantin Tsiolkovsky was a pioneering Russian rocket scientist and cosmonautics theorist, shaping future space exploration.
Hiram Maxim was an American inventor and engineer, renowned for his development of the first self-powered machine gun, the Maxim Gun, and contributions to the early electric light industry.
Paul Allen was an American billionaire, co-founder of Microsoft, and a philanthropist known for his contributions to technology, space exploration, and science.