Apollo 11 Technical Crew Debriefing, 1969

A week after splashdown, the Apollo 11 crew sat down with NASA engineers to go through the flight system by system. This file pulls three passages from that technical debriefing, all spoken by Lunar Module Pilot Buzz Aldrin, about things he saw that were not on the flight plan. It is the source for one of the most retold astronaut “UFO” stories, so it is worth reading in the crew’s own framing.

The three observations

The first, on the outbound leg, is an object with “a sizeable dimension” that the crew studied through a monocular — a small handheld telescope. In the debriefing the crew raised the possibility that it was the S-IVB, the Saturn V’s third stage, which had been jettisoned and was travelling the same way.

The second is quite different: faint flashes inside the darkened cabin, noticed while Aldrin was trying to sleep, a couple of minutes apart. The third, on the way home, is a fairly bright light source that the crew tentatively put down to a laser; the excerpt says nothing more about it.

What came of them

The cabin flashes turned out to matter most scientifically. NASA doctors came to suspect cosmic rays passing through the eye, and later crews were questioned about the same effect — see the next crew’s medical debriefing and the dedicated experiments flown on later missions. The outbound object was never formally identified in this record. Read together, the passages show the crew offering ordinary candidates themselves rather than claiming anything unexplained.