Konstantin Eduardovich Tsiolkovsky  5 September 1857 – 19 September 1935) was a Russian who pioneered spaceflight. When Konstantin was young, he had scarlet fever; because of that he had some problems with hearing and had to study by himself. he became a schoolteacher and, in his spare time, studied and wrote about spaceflight.
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- Russian: Russian: Константи́н Эдуа́рдович Циолко́вский, Polish: Konstanty Ciołkowski
- Konstantin E. Tsiolkovsky – Soviet Space Scientist. From San Diego Aerospace Museum Educational Materials