The luminosity class of a star tells an astronomer
A) whether the star is close to us or far away
B) whether or not the star is surrounded by planets
C) whether the star is a supergiant, a giant, or a main-sequence star
D) how long ago the star formed
E) none of the above

Question

Quizplus · Accepted Answer

The luminosity class of a star tells an astronomer whether the star is a supergiant, a giant, or a main-sequence star based on its size, temperature, and brightness. It does not provide information about the star's distance, planetary system, or age.

The Luminosity Class of a Star Tells an Astronomer