The brightest planet in our sky is Venus, which is sometimes as bright as apparent magnitude -4… 1 answer below »

The brightest planet in our sky is Venus, which is sometimes as bright as apparent magnitude -4 when it is at a distance of about 1 AU. How many times fainter would it look from a distance of 1 parsec? What would its apparent magnitude be? Note that 1 pc is 2.06 ×105 AU. (Hints: See the inverse square law from Chapter 13; also, review the definition of magnitudes in Chapter 2.)  

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