One of the brightest stars in our sky has been behaving very unusually. Now scientists think they know why

The recent unusual behaviour of the star Betelgeuse could finally have been explained, after new work by astronomers. The star has been dimming strangely in recent months, with scientists speculating that it could be about to explode into a supernova or was otherwise being subject to an unknown process. Now new research has shown that the most likely explanation of the dimming is large star spots on Betelgeuse's surface, which have caused it to dim.

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