How many times fainter would venus look from a distance

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Venus I.

The brightest planet in our sky is Venus, which is sometimes as bright as apparent magnitude -4 when Venus is at a distance of about 1 AU. How many times fainter would Venus look from a distance of 3 parsecs? Note that 1 pc is 2.06×105 AU. (Hint: Use the inverse square law)

F1/F2 = _______ times fainter.

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