1. The problem statement, all variables and given/known data Suppose that three astronomical objects (1, 2, and 3) are observed to lie on a line, and that the distance from object 1 to object 3 is D. Given that object 1 has 1.5 times the mass of object 3 and seven times the mass of object 2, find the distance (in terms of D) between objects 1 and 2 for which the net force on object 2 is zero. ____ D m 2. Relevant equations F = (G x m1 x m2) / r^2 3. The attempt at a solution I drew a diagram of this, and had no luck figuring out what to do next.