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[Only if you understand the problem, please solve. I really need to get correct answer. Last guy answered it wrong.]

suppose a cepheid has a period of 2 days. estimate its luminosity from the figure above and then determine its distance if its measured brightness is 6.6 x 10^-12 watts/m^2

its distance is ____ x 10^7m

. Cepheid variables .RR Lyrae stars 104 103 10 0.2 0.5 1 2 5 10 20 50 100 Pulsation period (days) Suppose a Ceoheid has a period of 2 days. Estimate its luminosity from the figure above and then determine its distance if its measured brightness is 6.6 10-12 watts /2 A period of 1 days corresponds to s luminosity of about 400 Lo its distance i107 m

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