Betelgeuse is the bright red star representing the left shoulder of the constellation Orion. All the following statements about Betelgeuse are true. Which one can you infer from its red color?
A. Its surface is cooler than the surface of the Sun.
B. It is much more massive than the Sun.
C. It is much brighter than the Sun.
D. It is moving away from us.
For a star it has a rather low surface temperature (6000 F compared to the Sun's 10,000 F). The low temperature means that the star will appear orange-red in color. Betelgeuse emits almost 7,500 times as much energy as the Sun.
