He also lectured at the Cosmonaut Training Centre, teaching the physics of spaceflight.

After two successful missions, including a two-month stay on the Salyut 4 space station, he was pulled from active flight status in 1976.

[1] In 1971, he was the backup Flight Engineer for the ill-fated Soyuz 11 Mission, which ended in disaster when the craft depressurized above the Kármán line, killing the three man crew.

During the 1980s he was the host of a popular television program on space exploration entitled Man, Earth, Universe.

Sevastyanov, along with Aleksey Leonov, Rusty Schweickart and Georgy Grechko established the Association of Space Explorers in 1984.