Science help need this bad!?

Question

I'm doing a review for a test and don't know what the absolute magnitude is the measure of

is it the size of the star/ or the age of the star/ or the amount of light generated from the surface/ or the temperture of the star

Answer 1

ABSOLUTE MAGNITUDE (H)

Definition: An asteroid's absolute magnitude is the visual magnitude an observer would record if the asteroid were placed 1 Astronomical Unit (AU) away, and 1 AU from the Sun and at a zero phase angle.

(I don't understand why you post questions like this in Yahoo!Answers instead of going to Google yourself.)