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If star A is 20 light years away from earth and star B is 40 light years away from earth,which star appears brighter and by what factor?
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If star A is 20 light years away from earth and star B is 40 light years away from earth,which star appears brighter and by what factor?

User ChAmi
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Answer:

Because Star A and Star B have identical luminosities, the difference in their apparent brightness is due solely to distance. Star B is twice as far from Earth as Star A.

Step-by-step explanation:

User Vitosorriso
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