NMLP P-012443 · Point of issue · minted 2026-07-04

The UFO Experience

J. Allen Hynek · Henry Regnery · 1972

In it Hynek — the astronomer who served as scientific consultant to the US Air Force's Project Blue Book — set out his now-famous classification of sightings, including the 'close encounter' categories

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New Mexico Literacy Project — Point of issue NMLP P-012443 for "The UFO Experience" by J. Allen Hynek (https://newmexicoliteracyproject.org/id/point/p-012443, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).