Evidence Media
Audio Record — Segment 1Audio Record — Segment 2
Initial Report
Field ReportThis file contains two segments (D028 and D029) of the Apollo 17 post-mission crew medical debriefing at the Manned Spacecraft Center (now Johnson Space Center), Houston, Texas. In the recordings, crew members 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. Two of the three crew members reported observing these flashes at various points during the mission, including in lunar orbit and while on the lunar surface.
The debriefings represent a key historical record of astronaut observations of unexplained visual phenomena during deep-space travel, predating formal scientific studies of the effect. The questioners attempt to distinguish the characteristics of the observed phenomena across both segments.
Official Investigation
Investigation RecordThe case was submitted to the All-domain Anomaly Resolution Office (AARO) for formal assessment as part of the office's centralized UAP reporting pipeline. AARO reviews all reports submitted by military branches, intelligence agencies, and other government bodies, applying standardized analytical criteria to determine whether observed objects or phenomena can be identified as conventional aircraft, drones, atmospheric phenomena, or sensor artifacts, or whether they exhibit genuinely anomalous characteristics warranting further investigation.
This material was among records identified in response to Congressional oversight requests and was publicly released as part of the Department of War's disclosure initiative. The release is intended to promote transparency and enable independent analysis of UAP-related records held by the U.S. government.
Formal Conclusions
Official DeterminationThe official conclusion of AARO is that this case remains an unresolved UAP report. The available evidence does not provide sufficient information to conclusively identify the phenomenon as any specific conventional platform, nor does it contain observable characteristics that can be definitively categorized as anomalous. The designation "unresolved" reflects the determination that the available evidence is insufficient to reach a positive identification or to rule out conventional explanations.
This case is representative of a category of AARO reports where the duration and quality of the available data are inadequate to support a definitive analytical conclusion. Such cases remain open in AARO's case management system and may be revisited if additional data becomes available.
Remaining Unknowns & Open Questions
Unresolved Matters- Q.01
What was the true nature and origin of the light flash phenomena observed by the Apollo 17 crew?
While high-energy cosmic rays are now understood to cause such perceptions, the specific characteristics reported by the crew may not be fully explained by this mechanism alone.
- Q.02
Were the light flashes observed during specific mission phases (lunar orbit, lunar surface EVA, trans-Earth coast, etc.) and does this correlate with radiation exposure levels or magnetic field geometry?
- Q.03
Have subsequent Apollo missions and long-duration ISS missions produced corroborating observations, and has the scientific community reached consensus on the full range of phenomena described?
- Q.04
What additional audio or transcript material from these debriefings exists but was not included in the released segments?
No source document has been linked to this case yet. The records released by the U.S. Department of War are indexed in the document library.