Suppose that a Type II Cepheid has an apparent magnitude (m) of 12 and a pulsation period of 3 days. Use the chart at right along with the period to find the absolute magnitude (M). Then use the interactive tool on the distance modulus page to determine the distance to the Cepheid variable star. What is the distance?
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Suppose that a Type II Cepheid has an apparent magnitude (m) of 12 and a pulsation period of 3 days....
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