PURSUE Record — NASA-UAP-D6, Apollo 17 Technical Crew Debriefing, 1973

The record catalogued as NASA-UAP-D6 is a declassified PDF excerpt from the Apollo 17 Technical Crew Debriefing, dated January 4, 1973 — a formal post-mission debrief conducted roughly two weeks after the crew's December 19, 1972 splashdown. It is one of 120 PDFs included in PURSUE Release 01, the May 8, 2026 declassified document package from the U.S. Department of War. The record's subject is a specific astronaut report: Lunar Module Pilot Harrison Schmitt's account of recurring light flashes observed throughout the mission.

What this record contains

The public release metadata for NASA-UAP-D6 does not specify an incident date, an incident location, or a releasing agency beyond the PURSUE Release 01 umbrella. The document is a single-part PDF. What the official description does provide is a verbatim excerpt from page 24-4 of the debriefing transcript, in which Harrison Schmitt describes light flashes that were "just about continuously during the whole flight when we were dark adapted." Schmitt noted one instance he believed was a flash on the lunar surface, and reported that during the ALFMED (Apollo Light Flash Moving Emulsion Detector) experiment — when the crew wore blindfolds — the visible flashes temporarily ceased, though they resumed that same evening before he went to sleep.

The ALFMED was a dedicated onboard instrument designed specifically to detect and characterize light flash phenomena, reflecting NASA's awareness that Apollo crews were consistently reporting unusual visual experiences in deep space. Schmitt's testimony is presented here as a first-person primary source embedded in a standard technical crew debriefing format — candid, unpolished, and not written for public release.

Historical & documentary context

Apollo 17 was NASA's final crewed lunar landing mission. Harrison Schmitt, a geologist, was the first scientist-astronaut to walk on the Moon, and his crew — alongside Commander Eugene Cernan and Command Module Pilot Ronald Evans — operated under the most scientifically rigorous mission plan of the entire Apollo program. Technical crew debriefings were standard NASA procedure: structured interviews in which crew members systematically reported anomalies, equipment behavior, and observations outside the ordinary. Because these documents were internal records rather than press materials, the level of candor in them tends to be high.

The light flash phenomenon Schmitt describes was not unique to Apollo 17. Multiple Apollo crews reported similar experiences going back to earlier missions, and by the time of Apollo 17, NASA had developed the ALFMED specifically to investigate them. The prevailing scientific explanation — then and now — is that high-energy cosmic ray particles transiting the spacecraft hull interact with the astronaut's retina or visual cortex, producing phosphene-like flashes of perceived light with no corresponding external light source. This is a documented biophysical effect of deep-space radiation exposure, and the ALFMED experiment was designed to correlate crew-reported flashes with instrument-detected particle events.

What this does and does not prove

What NASA-UAP-D6 documents is straightforward: Harrison Schmitt, in a formal NASA debrief, reported persistent light flashes throughout the Apollo 17 mission, including one he tentatively associated with the lunar surface. The record does not document an encounter with an unidentified craft, an anomalous external object, or any phenomenon Schmitt himself characterized as inexplicable in extraordinary terms. Its inclusion in a UAP release reflects the government's broad working definition of "unidentified aerial phenomena" — encompassing any unexplained sensory anomaly reported by credentialed observers — and not a determination that the flashes were anything other than cosmic-ray visual phenomena. The public release does not include detailed contextual metadata beyond the page excerpt and the official description blurb provided.

How it fits PURSUE Release 01

NASA-UAP-D6 sits within the NASA archive segment of PURSUE Release 01, alongside FBI files dating to 1947 and contemporary Department of War sensor mission records. Its presence reflects the release's stated analytical discipline: documented anomalies reported by credentialed observers — even those with plausible physical explanations — are included to build a complete evidentiary record rather than a curated highlight reel. For the full inventory of NASA archive entries and the rest of the 162-document set, every record is catalogued on the SkyLens UAP files page.

Editorial note: This analysis is independent commentary on a publicly released document. The original record, source links, and full release metadata are catalogued on the SkyLens UAP files page alongside every other case in the PURSUE Release 01 set.