A star whose absolute magnitude M is +2.2 is seen to have an apparent magnitude when viewed from Earth of +5.2.According to the equation in Discovery 10-2 in Comins,Discovering the Essential Universe,6th ed.,how far away is the star?
A) 40 pc
B) 12.3 pc
C) 130 pc
D) 3/5, or 0.6 pc

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The Answer of A star whose absolute magnitude M is +2.2 is seen to have an apparent magnitude when viewed from Earth of +5.2.According to the equation in Discovery 10-2 in Comins,Discovering the Essential Universe,6th ed.,how far away is the star?
A) 40 pc
B) 12.3 pc
C) 130 pc
D) 3/5, or 0.6 pc

A Star Whose Absolute Magnitude M Is +2