Stockholm University astrophysicist leading the VASCO project (Vanishing and Appearing Sources during a Century of Observations), which mines pre-satellite sky surveys for objects that appear and vanish. A 2025 Scientific Reports (Nature) paper reports that transients on 1950s Palomar plates correlate with nuclear-test days and UAP reports - a rare peer-reviewed thread tying the sky-anomaly question to the UFO-nuclear pattern.
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