Where do we find the most massive stars on the main sequence in a Hertzsprung-Russell diagram?
A) Upper left
B) They all have approximately the same mass because this is what defines the main sequence.
C) Lower right
D) Center,with lower mass stars on either side

Question

Quizplus · Accepted Answer

The upper left portion of the Hertzsprung-Russell diagram represents the most massive stars on the main sequence. These stars have high luminosity and high temperature, and they are commonly referred to as "O-type" stars.

Where Do We Find the Most Massive Stars on the Main