Boris Aleksandrovich Vorontsov-Velyaminov was a Russian astrophysicist. His name is sometimes given as Vorontsov-Vel'yaminov.
He independently discovered the absorption of light by interstellar dust, which was also discovered by Robert Julius... Wikipedia
Born: February 14, 1904, Russian Empire
Died: January 27, 1994 (age 89 years), Moscow, Russia