Yuri Kondratyuk Rare 2 Hryvnia Coin 1997, Mathematician, Space Scientist KM# 39

Description

YURI KONDRATYUK
Item description
Ukraine 2 Hryvnia Coin 1997
Series:
Outstanding Personalities of Ukraine
Condition:
Proof-like
Face Value
2 Hryvnia
Material
Copper-Nickel
Mintage
20000
Year
1997
Size
33,00 mm.
Weight
14,35 gram
UNC, in capsule.
Yuriy Vasilievich Kondratyuk (Russian: Юрий Кондратюк),
real name Oleksandr Hnatovych Shargei (Ukrainian: Олександр Гнатович Шаргей)
(June 21, 1897 in Poltava - February 1942),
was an Imperial/Soviet engineer and mathematician of Ukrainian descent.
He is 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.
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