Transient Flashes in Historic Palomar Photographs Linked to Nuclear Tests, Amid Renewed UAP Discourse

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A study of Palomar Observatory photos from 1949 to 1957 found about 106,000 brief, star‑like flashes in the northern United States near nuclear test sites that were more common after tests and increased with UFO sighting reports, especially when a sighting and a test occurred together, though the exact cause is uncertain and solar reflections from orbiting objects are a possible explanation.

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Did aliens spy on our nuclear tests? Study finds signs of UFOs near US sites in 1950s
usatoday.com

Did aliens spy on our nuclear tests? Study finds signs of UFOs near US sites in 1950s

The idea that nuclear weapons have long attracted extraterrestrials is ingrained in UFO mythology. Now, researchers found a surprising link.