Betelgeuse, approximately 100,000 times as luminous as the Sun and 400 million times its volume, is nearing the end of its life. As a variable star, it pulses with a heartbeat-like rhythm.

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Betelgeuse has been a favorite among amateur astronomers for many years. However you pronounce it, its unexpected dimming draws even more attention to this red supergiant variable star in Orion.