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The strange case of the shrinking star

Betelgeuse, the bright red supergiant star in the constellation Orion, has shrunk by more than 15 percent over the past 15 years, and astronomers aren’t sure why. Long-term monitoring by the University of California – Berkeley’s Infrared Spatial Interferometer (ISI) on the top of Mt. Wilson in Southern California shows that Betelgeuse has shrunk by […]

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