Founder of theoretical cosmonautics
A man of vision and imagination on a truly cosmic scale. Born in the Ryazan region of the Russian Empire and self-taught in mathematics and physics, he worked as a teacher and researcher.
"At age 28, I resolved to devote my life to aeronautics and develop a theoretical metal balloon." And he did. And he also came up with the idea for a "space elevator" and proposed the use of rockets for jet-propelled flights into space.
Tsiolkovsky advocated the theory of cosmism. He believed in the possibility of populating the universe with orbital stations. He wrote many philosophical works and several sci-fi novels on the theme of space exploration.