Our main result is that Betelgeuse was recorded with a color significantly different (non-red) than today. Hyginus (Rome) and Sima Qian (China) independently re

Our main result is that Betelgeuse was recorded with a color significantly different (non-red) than today. Hyginus (Rome) and Sima Qian (China) independently report it two millennia ago as appearing like Saturn in color and `yellow', respectively different from today. From the article