Popov was born in Oleksandriia, Kirovohrad Oblast, Ukrainian SSR. He was selected as a cosmonaut on April 27, 1970, and flew as Commander on Soyuz 35, Soyuz 40 and Soyuz T-7, logging 200 days, 14 hours, and 45 minutes in space before his retirement on June 13, 1987.