This figure shows the Cepheid period- luminosity relation. What is the approximate luminosity of a Cepheid star that varies in brightness on a 10 day cycle?
A) about 1000 times the luminosity of the sun
B) about 30,000 times the luminosity of the sun
C) about 10,000 times the luminosity of the sun
D) about 3000 times the luminosity of the sun
Correct Answer:
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