[oopsemist]

Opposite is true also: it's possible to add energy into three body system and increase distance between them (antigraviation). In principle, spherical gradient of gravitation creates possibility to increase orbit using only energy and interaction between masses even in two body system (if smaller body can change it shape and distibution of mass to simulate three body system). I had idea of such aparatus when I was student 30 years ago, but then I forgot the details.