On the H-R diagram, red supergiants like Betelguese lie:
A)at the bottom left.
B)at the bottom right.
C)at the top left.
D)at the top right.
E)They can't be plotted, for they are not main sequence.

Question

Quizplus · Accepted Answer

Red supergiants like Betelgeuse lie in the top right of the H-R diagram, also known as the upper-right region of the diagram, which corresponds to high luminosities and low surface temperatures. The position of Betelgeuse on the H-R diagram shows that it is a massive, evolved star that has consumed most of the hydrogen fuel in its core. Red supergiants like Betelguese lie at the top right of the H-R diagram due to their low surface temperature but high luminosity.

On the H-R Diagram, Red Supergiants Like Betelguese Lie