PPT Slide

Fundamental Astronomy: Brightnesses

Distance Modulus

End of Mathematical Aside!

• The quantity, m-M, is called the Distance Modulus

• We can always measure the apparent magnitude, m

• If we know the distance, D (e.g., from parallax), we can determine the absolute magnitude, M

• If we know the absolute magnitude, M, we can determine the distance, D

Previous slide

Next slide

Back to first slide

View graphic version