Betelgeuse is a red giant star, a stage that stellar bodies ... wrote about star colors in 100 BCE commenting "white is like Sirius, red like Antares, yellow like Betelgeuse, blue like Bellatrix." ...

A red giant star and white dwarf orbit each other ... and two of the brightest stars in the sky, Sirius and Antares, have magnitudes of −1 and 1, respectively. Objects with magnitudes lower ...

Because a red giant is so large, its heat spreads out and ... The brightest star in the nighttime sky, Sirius, or the Dog Star, greatly outshines its white dwarf companion, Sirius B.