I read Weyl tensor helps on propagating gravitational effects. Ricci is local depending on mass energy at that point and would vanish at other points. Weyl propogates the gravity effects (for example gravity at any point between Earth Moon is due to Weyl Tensor). I didn't quite get it mathematically. Why is Ricci local and Weyl somehow propagates gravity effects? I know basics like we can breaqk down Riemann curvature tensor in Ricci and Weyl and Einstein's Field equations have Ricci tensor.