Orionis: Alpha

Despite being only about 8 to 10 million years old —much younger than our 4.6-billion-year-old Sun—its massive size caused it to evolve rapidly.

It is roughly 100,000 times brighter than the Sun but significantly cooler, with a surface temperature of approximately 3,600 Kelvin (6,020°F). alpha orionis

Usually the 10th brightest star in the night sky, its magnitude typically ranges from +0.0 to +1.3 . Despite being only about 8 to 10 million

Betelgeuse is a , meaning its brightness fluctuates over time. 600 Kelvin (6

A red supergiant nearing the end of its life cycle.