Newton’s third law

Is Newton's law of gravity consistent with Newton's third law?

The third law requires two things. First, m₁'s force on m₂ should be the same as m₂'s force on m₁. This works out, because the product m₁m₂ gives the same result if we interchange the labels 1 and 2. Second, the forces should be in opposite directions. This condition is also satisfied, because Newton's law of gravity refers to an attraction: each mass pulls the other toward itself.