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)It is much brighter than the Sun.
B)Its surface is cooler than the surface of the Sun.
C)It is much more massive than the Sun.
D)It is moving away from us.

Question

Quizplus · Accepted Answer

The color of a star is a good indicator of its surface temperature. Red stars are cooler than yellow and blue stars, so we can infer that Betelgeuse's surface is cooler than the surface of the Sun.

Betelgeuse Is the Bright Red Star Representing the Left Shoulder