Constellations are made up of many stars and are arranged in accordance with mythology and legends. They are still used for navigation today. One such star is Betelgeuse, which is among the largest and brightest stars in our night sky.
The brilliant, ruby-red, glittering star known as Betelgeuse is located in the upper right shoulder of the winter constellation Orion the Hunter. When viewed attentively, though, astronomers recognize it as a seething monster with a 400-day-long heartbeat of regular pulsations.