What is the apparent visual magnitude of a star a measure of?
A) the star's size as perceived by human eyes on Earth
B) the star's temperature as perceived by human eyes on Earth
C) the star's colour as seen by human eyes on Earth
D) the star's brightness as seen by human eyes on Earth

Question

Quizplus · Accepted Answer

The apparent visual magnitude of a star is a measure of its brightness as seen by human eyes from Earth, not directly related to its size, temperature, or color, although these factors can influence brightness.

What Is the Apparent Visual Magnitude of a Star a Measure