What causes Frame Dragging (gravity friction)?
Frame Dragging is a phenomena predicted by GR and confirmed by experiment. Rotational Frame Dragging occurs when a massive object (like a planet, or neutron star) rotates and ‘drags’ on the space-time around it almost as though there were friction between the mass and the space around it. However, the force causing this is NOT friction. The thought experiment used to describe Frame Dragging is to imagine a paper plate with a puddle of Honey on it. Then you place a superball in the middle of the honey and rotate the superball. If there are peppercorns sprinkled in the honey, you will see the peppercorns which are nearest the superball pulled along by the viscosity of the honey. A similar effect occurs in the gravitational field of a rotating body.
