Betelgeuse’s colour changed in the last 2 millenia

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12 July 2022 at 4:52 pm #611411

Jeremy Shears
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….is the fascinating conclusion of an MNRAS preprint:https://arxiv.org/abs/2207.04702

Analysis of observations recorded in Chinese and Roman texts suggests it was not red 2 millenia ago. The authors claim this is observational evidence of stellar evolution in action.

12 July 2022 at 5:31 pm #611414

Dr Paul Leyland
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Oh no, not again. You can not be Sirius!

Get your popcorn ready. This should be entertaining when the other astrophysicists start laying into it. (Though the claimed 5.1σ is interesting.)
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