Question

question 17 of 19
four main - sequence stars are shown on this h - r diagram.
which star is the brightest?
stars are all the same brightness.
b
d
a
c
luminosity
main sequence
temperature

Explanation:

Step1: Understand H - R diagram

On an H - R diagram, luminosity represents brightness. Higher up on the luminosity axis, brighter the star.

Step2: Identify the star

Star A is the highest up on the luminosity axis among the four main - sequence stars A, B, C, and D.

Answer:

D. A