Comparing a 70-year-old survey with recent images of the night sky, astronomers have discovered that 100 stars may have gone dark. Those vanishing light sources could be short-lived flashes in the night or possibly, the disappearance of a long-lasting star. These preliminary findings almost certainly represent natural and well-understood events, but there is the hope that they could indicate technological civilizations elsewhere.
Speakers: Beatriz Villaroel, Vanishing & Appearing Sources during a Century of Observations (VASCO); James Davenport, University of Washington
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