If the RR lyrae stars in a globular cluster have average apparent magnitudes of +15, how far away (in pc) is the cluster? (Hint: See the following figure, and use the magnitude-distance formula: d=10(Mv-Mv+5)/5
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If the RR lyrae stars in a globular cluster have average apparent magnitudes of +15, how far away (in pc) is the cluster? (Hint: See the following figure, and use the magnitude-distance formula: d=10(Mv-Mv+5)/5
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