A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its distance from us. The absolute magnitude of the Sun is 4.83. A. 3 Mpc B. 0.3 Mpc C. 30 Mpc D. 300 Mpc

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Chapter1: Units, Trigonometry. And Vectors
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A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its distance from us. The absolute magnitude of the Sun is 4.83.

A. 3 Mpc
B. 0.3 Mpc
C. 30 Mpc
D. 300 Mpc
 
Is the answer D? Thanks!
 
 
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