Science News: Betelgeuse, one of the brightest stars visible to the naked eye, has shrunk in diameter by more than 15 percent since 1993.
The star, a red supergiant, has a radius exceeding the distance between the sun and Jupiter. The shrinkage corresponds to the star contracting by a distance equal to that between Venus and the sun, researchers reported June 9 at an American Astronomical Society meeting and in the June 1 Astrophysical Journal Letters.
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A systematic change with time in the size of Betelgeuse
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