Apollo 17 was the ninth crewed U.S. mission to the Moon, and the sixth to land astronauts on the lunar surface. This document is an excerpt from the Apollo 17 Technical Air-to-Ground Voice Transcription, December 1972, highlighting three periods in which astronauts reported observing unidentified phenomenon: a nine minute period on the first day, a three hour period on the second day, and a six minute period on the third day. • Day 00, Hour 03, Minute 34, Second 10 through Day 00, Hour 03, Minute 42, Second 29: o Command Module Pilot (CMP), Ronald Evans, reported observing “very bright particles or fragments” drifting and “tumbling” near the spacecraft as it maneuvered. Lunar Module Pilot (LMP), Harrison “Jack” Schmitt, described the phenomenon as looking “like the Fourth of July.” The astronauts speculated that the phenomenon may be attributable to ice or paint fragments dislodging from a separated component of the spacecraft (S-IVB) but characterized that assessment as a “wild guess.” • Day 02, Hour 18, Minute 42, Second 34 through Day 02, Hour 21, Minute 07, Second 05: o Mission Commander, Eugene A. Cernan, reported difficulty sleeping and described having observed “some sets of the streaks.” He also described an intense light flashing between his eyes, describing its intensity as comparable to that of a train headlight and characterizing it as “imposing.” Over the next three hours, Cernan described observing several flashing, rotating phenomenon that he assessed as corresponding to physical objects in space rather than a purely optical phenomenon. LMP Schmitt also reported observing similar phenomenon, though he again assessed the source of his observation to be a separated rocket stage (S-IVB). At 02:20:55:22, Cernan reported observing two additional distant flashing objects, though he assessed them as Spacecraft/Lunar Module Adapter panels (SLA panel), another separated component of the Saturn V rocket. • Day 03, Hour 15, Minute 33, Second 25 through Day 03, Hour 15, Minute 39, Second 46: o At 03:15:38:09, LMP Schmitt exclaimed that he had observed a flash on the lunar surface north of Grimaldi (crater).

Apollo 17 was the ninth crewed U.S. mission to the Moon, and the sixth to land Astronauts on the lunar surface. This document is an excerpt from the Apollo 17 Technical Crew Debriefing on January 4, 1973, in which astronaut Harrison Schmitt reported seeing light flashes. • Page 24-4. [Lunar Module Pilot Harrison Schmitt]: “We had light flashes just about continuously during the whole flight when we were dark adapted. I had one which I thought was a flash on the lunar surface. That one period of time when we had the blindfolds on for the ALFMED [Apollo Light Flash Moving Emulsion Detector] experiment there were just no visible flashes, although that evening, that night, before I went to sleep, I noticed that I was seeing the light flashes again.”