Groundphlegm

Hubble finds that Betelgeuse's mysterious dimming is due to a traumatic outburst

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Last year, we detected some unusual dimming of Betelgeuse. Now we know why:

"With Hubble, we had previously observed hot convection cells on the surface of Betelgeuse and in the fall of 2019 we discovered a large amount of dense hot gas moving outwards through Betelgeuse's extended atmosphere. We think this gas cooled down millions of miles outside the star to form the dust that blocked the southern part of the star imaged in January and February," said Andrea Dupree, associate director of the Center for Astrophysics | Harvard & Smithsonian, and lead author on the study.

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