The luminosity of a star is
A) another name for its color or surface temperature.
B) its brightness as seen by people on Earth.
C) its total energy output into all space over all wavelengths.
D) its brightness at a hypothetical distance of 10 parsecs (32.6 light-years)from Earth.

Question

Quizplus · Accepted Answer

Luminosity is a measure of the total amount of energy that a star emits per unit time, across all wavelengths. It is an intrinsic property of the star and does not depend on its distance from Earth.

The Luminosity of a Star Is