An Astronomer Observes Two Stars,A and B

question 16

Essay

An astronomer observes two stars,A and B.Star A has a temperature of 3,000 K,a radius 10 times that of our Sun,and is 10 parsecs away.Star B has a temperature of 6,000 K,a radius equal to that of our Sun,and is 40 parsecs away.Which star is brighter,and by how much?

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