Russia 1951 – Konstantin Tsiolkovsky
Konstantin Eduardovich Tsiolkovsky (1857–1935) was a Russian pioneer of spaceflight whose speculations started even
before the first aircraft had flown. The Russians term him the Father of
Astronautics. By profession he was a mathematics teacher. In 1903 he published
an article titled Exploration of Space by Means of Reactive Devices which contained the first theoretical proof that space travel by rocket was
possible; his basic equation is now known as the Tsiolkovsky equation. The
article included a design for a rocket that would work on liquid hydrogen and
liquid oxygen, the fuels used by many modern rockets. Tsiolkovsky realized that
multi-stage rockets (which he termed “rocket trains”) would be needed to escape from Earth. He published this idea in 1929 in his
book Rocket Space Trains. Shortly before his death he wrote of a rocket with boosters arranged side by
side, similar to the staging technique actually adopted by Russian space
boosters.
This stamp is part of a set of 16 commemorating various Soviet scientists.
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