Konstantin Tsiolkovsky

"Earth is the cradle of humanity, but one can't remain in the cradle forever."
What he started? He read Jules Verne's stories of space travel and began to write science fiction stories himself. He introduced elements of science and technology into his stories, such as the problem of controlling a rocket as it moved between gravitational fields. Gradually Tsiolkovsky moved from writing science fiction to writing theoretical papers on topics such as gyroscopes, escape velocities, the principle of action and reaction, and the use of liquid propellant rockets.

In 1894 Tsiolkovsky designed a monoplane that was not flown until 1915. He built the first Russian wind tunnel in 1897. He also thought a great deal about the uses of his beloved rockets to explore and master space.
In 1903 he published the rocket equation in a Russian aviation magazine. Called the Tsiolkovsky formula, it established the relationships among rocket speed, the speed of the gas at exit, and the mass of the rocket and its propellant. This equation is the basis of much of the spacecraft engineering done today. In 1929 he published his theory of multistage rockets, based on his knowledge of propulsion dynamics.
“The blue distance, the mysterious Heavens, the example of birds and insects flying everywhere —are always beckoning Humanity to rise into the air.”
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