Question

Two planets of the same mass are observed.

Which of the following distances between the two planets would result in the least gravitational attraction?

A. 90 light years
B. 80 light years
C. 60 light years
D. 50 light years

Answer 1

As the distance increases, the gravitational force between them decreases.
So, the option with the largest distance is (A) 90 light yrs. And that's the answer !!

Answer 2

It really doesn't matter what mass the planets have, or whether they're equal, or whether they're planets. The farther apart two objects are, the less gravitational attraction there is between them.