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OpenStudy (anonymous):
A measure of the amount of light given off by a star is its _____.
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OpenStudy (anonymous):
Brightness?
OpenStudy (anonymous):
Not really a physically strong word :) If you need an exact definition check your physics book.
OpenStudy (shane_b):
This should help: http://en.wikipedia.org/wiki/Luminosity Technically the answer is luminosity but since we're talking about stars here the answer your teacher is probably looking for is apparent magnitude. Check with your book.
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