Question

The absolute magnitude of a star________.

describes its actual brightness
describes how bright the star looks from earth
changes according to the observer’s location on earth
is multiplies by the apparent magnitude to determine distance

Answer 1

The absolute magnitude of a star is how bright it would appear to us
if it were located ten parsecs (about 32.6 light years) from us. So it's
a way of treating all stars equally ... on a "level playing field" ... and it
describes each star's actual brightness.