NASAUnknownAmbiguous
Apollo 17 LMP observes flash on lunar surface north of Grimaldi — lunar orbit
~Dec 1972Lunar surface, north of Grimaldi crater, Moon1s
Analysis — our summary
During lunar orbit, LMP Schmitt reported a brief bright flash on the lunar surface north of Grimaldi crater, describing it as a 'thin streak of light.' He requested Houston check seismometers, noting a small impact could produce visible light. Mission control acknowledged and said they would check. No follow-up resolution is present in this excerpt.
As reported — verbatim from the document
“"Hey, I just saw a flash on the lunar surface!... It was just out there north of Grimaldi... It was a bright little flash right out there near that crater... Fairly sharp one north of it is where there was just a thin streak of light."”
Analyst notes — caveats & confidence
OCR is clean. The observation is consistent with a meteorite impact on the lunar surface producing a brief flash — a known phenomenon. LMP Schmitt's reference to checking seismometers indicates scientific awareness of this possibility. Mission elapsed time approximately 03:15:38. Single observer. No seismometer data included in excerpt.
Associated imagery
Provenance
Source documentNASA-UAP-D2-Apollo-17-Transcript-1972.pdf
Document typemission transcript
Reporting agencyNASA
Source pages16
DeclassifiedFirst public at this release (2026)
Held classified~54 years (≥, to this release)
Extraction confidence HighHow cleanly this record could be parsed from the source — driven by legibility & redaction. It is not a measure of how credible or anomalous the sighting is.