Astronaut Saw Repeated Flashes of Light on the Way to the Moon

• Evans's description of a 'tunnel with a bright spot in the middle of the tunnel' seen through the rendezvous window after a fireball decreased in brightness (page 2) — the document presents this as an unexplained visual experience.
• Near-continuous light flashes seen by all three Apollo 17 crew when dark-adapted, including one Schmitt thought was a flash on the lunar surface (page 2).
• Notable absence of visible light flashes specifically during the ALFMED experiment blindfold period, with flashes resuming that same night before sleep — bracketing the no-flash interval and contrasting with the otherwise continuous occurrence (page 2).

• 139-nasa-uap-d2-apollo-17-transcript-1972 — Apollo 17 air-to-ground transcript covering the same mission; pre-debrief real-time crew communications.
• 142-nasa-uap-d5-apollo-17-crew-debriefing-for-science-1973 — Apollo 17 Crew Debriefing for Science (8 January 1973), sibling/companion debrief of the same crew four days after this Technical Debriefing.
• 141-nasa-uap-d4-apollo-11-technical-crew-debriefing-1969 — companion Apollo Technical Crew Debriefing (Apollo 11) in the same NASA-UAP release series.
• 138-nasa-uap-d1-apollo-12-transcript-1969 — companion Apollo-era NASA-UAP excerpt in the same release.
• 144-nasa-uap-d7-skylab-technical-crew-debriefing-1973 — sibling NASA crewed-spaceflight technical debrief excerpt covering crew light-flash observations on Skylab.

Document is a 2-page excerpt (cover page plus a single body page) from the Apollo 17 Technical Crew Debriefing dated 4 January 1973, prepared by the Training Office, Crew Training and Simulation Division, MSC Houston. Cover page is heavily OCR-mangled stylized text with FOIA-exemption boilerplate and a NASA Declassification Guide stamp (E.O. 13526 Sec 3.3(a); date of guide May 2026) — original classification marking appears as 'TOP SECRET—SENSITIVE' (OCR-distorted) followed by 'LOG'. Body page contains three speaker exchanges: EVANS (CONT'D), CERNAN, EVANS, SCHMITT. The 'fireball' Evans references is unspecified in the excerpt (likely re-entry, given context, but the document does not state this — omitted accordingly). The 'CMP' Cernan references is Evans (Apollo 17 Command Module Pilot). ALFMED = Apollo Light Flash Moving Emulsion Detector (acronym expansion not given in this excerpt's body but provided in the manifest description). Distinct from slug 142 (Crew Debriefing for Science, 8 Jan 1973, science-focused) and slug 139 (Apollo 17 air-to-ground transcript, 1972, real-time mission comms). Confidence 0.82: text is short, speakers are clearly tagged, body page is clean OCR; reduced for unreadable cover and the excerpt being only two pages of a much larger volume.