Luboš Perek

Luboš Perek (26 July 1919 – 17 September 2020) was a Czech astronomer. He was born in Prague. Perek was best known for his "Catalogue of Galactic Planetary Nebulae" co-written in 1967 with Luboš Kohoutek. 
From 1967 to 1970, he was General-Secretariat of the International Astronomical Union.
He worked on the mass in the galaxy, high-velocity stars, planetary nebulae, definition of outer space, geostationary orbit, space debris, and management of outer space.
Perek turned 100 in July 2019. He died on 17 September 2020 in Prague, aged 101.