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.
Charles "Chuck" Yeager, a pioneering American aviator and test pilot who became the first person to break the sound barrier in 1947.
A.P.J. Abdul Kalam was an Indian scientist and statesman, known as the "Missile Man of India," who served as the 11th President of India, promoting science and education.