Autobiographical notes of the brilliant scientist, founder of cosmonautics K. E. Tsiolkovsky were prepared for publication by research staff of the State Museum of the History of Cosmonautics named after. K. E. Tsiolkovsky with the participation of the K. E. Tsiolkovsky Foundation. The book is illustrated with photographic documents and works of art from the collection of the State Museum of Cinematography. Many materials are published for the first time.The book’s text has been translated from the original language using an artificial intelligence system. In most cases, the translation is accurate and clear, but occasionally there may be incorrect phrasing or individual words left untranslated.