Please explain how we judge the brightness of stars.

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asked Feb 2, 2017 113k views

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JOM · Answer 1 · 2017-02-08T08:01:17+0000

astronomers can measure it by way of luminosity which is the power of a star or the amount of energy (light) the star admits from its surface. they also measure the brightness of a start as if it were to appear 32.6 light years from Earth

Please explain how we judge the brightness of stars.

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