Question

question 12 of 19
four main - sequence stars are shown on the hertzsprung - russell diagram.
which star is the most blue?
c
a
d
b
all stars are the same color.
luminosity
main sequence
temperature

Explanation:

On a Hertzsprung - Russell diagram, hotter stars are bluer. Stars higher up on the main - sequence are hotter. Star A is the most luminous among the main - sequence stars shown and is at the top of the main - sequence, indicating it is the hottest and thus the most blue.

Answer:

A. A