The luminosity of a star is a unique measure of its:
A) total energy output.
B) velocity of recession away from us.
C) temperature.
D) physical size.

Question

Quizplus · Accepted Answer

Luminosity is a measure of the total energy output of a star, taking into account both its brightness and distance from us. It is independent of the star's velocity of recession, temperature, and physical size.

The Luminosity of a Star Is a Unique Measure of Its