Hello, the concept of potential gravitational energy seems very confusing to me, and it leads me to several questions, and I was wondering if some of you could explain this energy conceptually to me perhaps based with these questions as guidelines. Potential gravitational energy increases mass right? So if I lifted an object up from the earth, it should get heavier. Potential energy keeps increasing as you lift something up more and more if I'm not mistaken, but the amount it increases at would start decreasing after certain heights right? Does this energy ever start decreasing? Would voyager1 still be a bit heavier because it left the earth? When lifting an object, the potential gravitational energy of the particles inside the earth would also increase a bit as they are also attracted to whatever is lifted slightly. So lifting an object should increase the mass of the earth right? If both the mass of the object and the earth get higher, shouldn't that also increase the amount of gravity between them as gravity depends on mass? Leading to some sort of endless loop. Mass increases, meaning more potential gravity, meaning more mass,and so on. If you lift object A from the north side of the earth, and you then lift object B from the south side, what happens to the potential gravitational energy in the earths particles? Does it increase during A and then decrease during B as it's cancelled out, or do these add to each other? If you lift a particle to a certain height, and if you could create a new particle right next to it somehow, would this new particle have the same potential gravitational energy as the old one, increasing its mass instantaneously?