Translunar space (approximately 1 day from the Moon)

This is an excerpt from the Apollo 11 Technical Crew Debriefing conducted July 31, 1969, prepared by NASA's Mission Operations Branch. Buzz Aldrin describes three observations during the mission: a sizeable object with an L-shape seen about one day from the Moon, which the crew could not identify after ground control reported the S-IVB was 6,000 miles away; recurring light flashes inside the darkened cabin spaced roughly a minute apart, which Aldrin tentatively attributed to "some sort of penetration" of particles through the spacecraft.