Zemnoĭ rubez︠h︡ I︠u︡rii︠a︡ Kondrati︠u︡ka
(
Серия Bibliotechka voenno-istoricheskogo z︠h︡urnala "Orlovskiĭ voennyĭ vestnik". Spet︠s︡vypusk 2 (17)
)
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Yuri Vasilyevich Kondratyuk (real name was Alexander Ignatyevich Shargey, 1897-1942) was Soviet engineer of Swedish-Jewish origin, one of the founders of cosmonautics. At the beginning of the 20th century, he calculated the optimal trajectory of flight to the Moon.
