Jack W. Aeby (//; born August 16, 1923) is an American environmental physicist most famous for having taken the only well-exposed color photograph of the first detonation of a nuclear weapon on July 16, 1945 at the Trinity nuclear test site in New Mexico. While color motion pictures of the Trinity test were made, most were badly overexposed or damaged due to the fireball's tendency to blister and solarize the film. Aeby was a civilian assigned to the Health Physics Group with Emilio Segrè at the time his snapshot was taken.
As the shock wave hit Base Camp, Aeby saw Enrico Fermi with a handful of torn paper. "He was dribbling it in the air. When the shock wave came it moved the confetti. He thought for a moment."
The photo was taken with a Perfex 33 with a 35mm lens, using a shutter speed of 1/100 at f4 and Anscochrome color film.
Jack Joined the Manhattan Project in 1942 and through his work with the Los Alamos National Laboratories has witnessed nearly 100 nuclear explosions. He currently lives in the Espanola Valley in Northern New Mexico with his wife Jeanne. He has 5 children.
- Berlyn Brixner – official Trinity test photographer
- Jeffrey, Ian et al. (1997). The Photography Book. London:Phaidon Press Limited. ISBN 0-7148-4488-8
- 2003 Video Interview with Jack Aeby by Cynthia C. Kelly
- Article featuring Aeby talking about his photograph
- DOE page about Aeby's photograph
-  Albuquerque Journal article about Jack Aeby
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