# 1. If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in…

1. If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs? In light-years? 8. An O8 V star has an apparent magnitude of 2. Use the method of spectroscopic parallax to estimate the distance to the star. (Hints: Refer to one of the H–R diagrams in the chapter; use the magnitude distance formula in Reasoning with Numbers 13-2.)

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