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Well, this Astronomy Now article is a pretty complete summary. You probably also want to follow the link to this article from last June, which talks about Betelgeuse's accelerating shrinkage over the period from 1993 to 2009.
Well, this Astronomy Now article is a pretty complete summary. You probably also want to follow the link to this article from last June, which talks about Betelgeuse's accelerating shrinkage over the period from 1993 to 2009.