17-06-2021, 08:56 AM
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ze frogginator
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Join Date: Oct 2007
Location: Sydney
Posts: 22,062
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Mystery of Betelgeuse’s dip in brightness solved
Article here: https://www.eso.org/public/news/eso2109/
Quote:
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Betelgeuse’s surface regularly changes as giant bubbles of gas move, shrink and swell within the star. The team concludes that some time before the Great Dimming, the star ejected a large gas bubble that moved away from it. When a patch of the surface cooled down shortly after, that temperature decrease was enough for the gas to condense into solid dust.
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