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.

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. What would Venus's apparent magnitude be if Venus at a distance of 8 parsecs? Note that 1 pc is 2.06 ×105 AU. (Hint: Use the inverse square law.)