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Giant Star Spots Probably Causes Betelgeuse Dimming

Red Supergiant – Artist impression of Betelgeuse. Its surface is covered by large spots of stars, which reduce its brightness. During their pulsations, such stars regularly release gas into their surroundings, which condenses into dust. Credit: MPIA Graphics Department Betelgeuse, the bright star in the Orion constellation, has been fascinating …

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