# Brightness and Magnitude

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The brightness ratio between two celestial objects, the flux ratio, is defined as , where and are the apparent magnitudes of the objects. The magnitude scale is a much more convenient way to express brightness measurements than using actual brightness measurements that use much larger numbers. Brightness and magnitude are important introductory topics in basic astronomy.

Contributed by: Jeff Bryant (March 2011)

Open content licensed under CC BY-NC-SA

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"Brightness and Magnitude"

http://demonstrations.wolfram.com/BrightnessAndMagnitude/

Wolfram Demonstrations Project

Published: March 7 2011