A cold spot and a stellar burp led to strange dimming of Betelgeuse

AndronETalksNews
arsTechnica
BY JENNIFER OUELLETTE
In December 2019, astronomers noticed a strange, dramatic dimming in the light from Betelgeuse, a bright red star in the Orion constellation. They puzzled over the phenomenon and wondered whether it was a sign that the star was about to go supernova.
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