What is absolute magnitude?
A:The measure of actual brightness of a star.
B:The measure of the amount of light given off by a star.
C:The measure of how bring a star appears from Earth.
D:The size of the star.
A:The measure of actual brightness of a star.
B:The measure of the amount of light given off by a star.
C:The measure of how bring a star appears from Earth.
D:The size of the star.