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Two stars appear the same brightness to us on Earth. One is 40 light-years away, one is 90 light-years away. Which has the higher luminosity?
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Two stars appear the same brightness to us on Earth. One is 40 light-years away, one is 90 light-years away. Which has the higher luminosity?

User Amir Uval
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90 light years away …..
User Robert Goldwein
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