An astronaut in training on the Lunar Landing Simulator in 1965.

In this historical photo from the U.S. space agency, Astronaut Roger B. Chaffee (left) receives instruction from Maxwell W. Goode, a scientist at NASA's Langley Research Center.

Goode is explaining the operation of the Lunar Landing Simulator at the Lunar Landing Research Facility.

Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).