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Memory medal. Yuri Kondratyuk 1897-1942

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Memory medal. Yuri Kondratyuk 1897-1942
uriy Vasilievich Kondratyuk (real name Aleksandr Ignatyevich Shargei, June 21, 1897 – February 25 1942) was a Soviet engineer and mathematician. He was a pioneer of astronautics and spaceflight, a theoretician and a visionary who, in the early 20th century, developed the first known Lunar Orbit Rendezvous (LOR), a key concept for landing and return spaceflight from Earth to the Moon. The LOR was later used for the plotting of the first actual human spaceflight to the Moon. Many other aspects of spaceflight and space exploration are covered in his works.
Kondratyuk made his scientific discoveries in circumstances of war, repetitious persecutions from authorities and serious illnesses.
“Yuriy Kondratyuk” is a stolen identity under which the author was hiding after the Russian revolution and became known to the scientific community.