cohort. n. 1. (Military) one of the ten units of between 300 and 600 men in an ancient Roman Legion. 2. any band of warriors or associates: the cohorts of Satan. 3.
As an early M-type supergiant, Betelgeuse is one of the largest, most luminous and yet one of the most ethereal stars known. A radius of 5.5 AU is roughly 7003118000000000000â 1180 times the radius of the Sunâable to contain over 2 quadrillion Earths (2.15 Ã 1015) or more than 1.6 billion (1.65 Ã 109) Suns.
Combined with the fact that it is only 640 light years away from the Earth, this means that Betelgeuse is one of the brightest stars in the sky. In fact, there are only 8 other stars that appear brighter than Betelgeuse. In terms of the galaxy, Betelgeuse is a youngster at only around 10 million years.