Text: "Exploration of the Universe," by Abell, Morrison, and Wolff


Vocabulary: Chapter 22.1a and 22.3a (pages 379 -384)

You should be familiar with the following terms and concepts



1st magnitude vs. 6th magnitude (what's the difference)


luminous flux


apparent visual magnitude


explain table 22.2


intrinsic vs. apparent output


absolute magnitude




what factors determine how bright a star looks to us here on earth?


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