Betelgeuse’s colour changed in the last 2 millenia › Forums › Variable Stars › Betelgeuse’s colour changed in the last 2 millenia This topic has 1 reply, 2 voices, and was last updated 2 years, 1 month ago by Dr Paul Leyland. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 12 July 2022 at 4:52 pm #611411 Jeremy ShearsParticipant ….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 LeylandParticipant 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.) Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Connect with :Login with Sheep CRM Log In