Correcting Magnitudes for Distance
	� To correct intensity or flux for distance, use Inverse Square Law � Up to now we have used �apparent magnitudes�� mv � Define absolute magnitude Mv as magnitude star would have �if it were at a distance of 10 pc. � This gives us a way to correct Magnitude for distance, or find distance if we know absolute magnitude. Note:� the book writes mv and Mv:� The �V� stands for �Visual� -- Later we�ll consider magnitudes in other colors like �B=Blue� �U=Ultraviolet�