NASA-UAP-D028, Apollo 17 Crew Medical Debriefing, 1972 is an official record distributed by NASA, recorded in Houston, Texas, on December 21, 1972. The document was declassified and released publicly for the first time as part of PURSUE Release 04 on July 10, 2026. 1234
Provenance and Background
This file contains segment 1 of 2 of the Apollo 17 post-mission medical debriefing at the Manned Spacecraft Center, now the Johnson Space Center, in Houston, Texas. The debriefing continues in the next file, NASA-UAP-D029.34
Record Content and Analysis
In the recording, crew members discuss the light flash phenomena with debriefers. Two of the three crew members reported seeing the flashes at various points during the mission, including in lunar orbit and on the lunar surface. The phenomenon was a novel effect at the time of the mission and is now understood as high-energy cosmic rays passing through the eye and striking the retina, producing the perception of light streaks.34