What is absolute magnitude? (1 point)
A-The measure of the amount of light given off by a star.
B-The measure of how bring a star appears from Earth.
C-The size of the star.
D-The measure of actual brightness of a star.
A-The measure of the amount of light given off by a star.
B-The measure of how bring a star appears from Earth.
C-The size of the star.
D-The measure of actual brightness of a star.