I suppose you could, but remember Newt. Gravity pushes/pulls things towards/away from it, not to be confused with centrifugal and centripital forces, which have to do with that, so unfortunately no :/. However, I did see a save some time ago that had a few particles that rotated around each other, but that didn't use Newt. Gravity, and it probably used WHOL with the gravity setting on "radial".