On September 12, 1966, astronauts Charles “Pete” Conrad and Richard Gordon lifted off on the Gemini 11 mission, spending nearly three days in orbit. Here’s a look at images of the mission from the archives at NASA.

Astronauts Charles Conrad (foreground), command pilot, and Richard F. Gordon, pilot, in the Gemini 11 spacecraft in the white room atop Pad 19 awaiting the final minutes of the prelaunch countdown, September 12, 1966.

NASA