Question

which of these properties is the best measure of a star’s brightness? (1 point)

○ absolute magnitude

○ size

○ apparent magnitude

○ age

Explanation:

Absolute magnitude measures a star's intrinsic brightness at a standard distance (10 parsecs), making it the best measure of a star's actual brightness. Apparent magnitude only measures how bright a star appears from Earth, which depends on distance, while size and age do not directly measure brightness.

Answer:

absolute magnitude