Where are the MOST massive stars to be found in the main sequence of a Hertzsprung-Russell diagram?
A) the upper left end
B) Main-sequence stars all have approximately the same mass, by definition.
C) the center
D) the lower right end

Question

Quizplus · Accepted Answer

The upper left end of the main sequence on a Hertzsprung-Russell diagram represents the most massive stars. This is because they have a large amount of fuel (hydrogen) in their cores, causing them to burn brighter and hotter, and thus they appear towards the upper left. The lower right end of the main sequence represents less massive stars that burn cooler and dimmer.

Where Are the MOST Massive Stars to Be Found in the Main