Apollo 14 Debriefing, 1971
An audio recording of the Apollo 14 crew being questioned about something that genuinely puzzled scientists at the time: unprompted flashes of light the astronauts perceived in deep space with their eyes closed. The debriefing captures researchers trying to characterize the phenomenon in real time — duration, color, pattern — before it was understood as cosmic rays punching straight through the human eye. It's a rare first-person account of a mystery being actively worked, not yet filed away.
This file contains segment 1 of 2 of the Apollo 14 post-mission crew debriefing at the Manned Spacecraft Center (now Johnson Space Center), Houston, Texas. In the recording, crew members and debriefers discuss the “light flash phenomena,” a then novel, now well-documented biological effect where high-energy cosmic rays pass through the eye and strike the retina, causing the perception of light streaks or flashes. The questioners attempt to distinguish the characteristics of the observed phenomena. The debriefing continues in the next file (NASA-UAP-D027), which contains some overlapping audio content.