Hi all, I am wondering if it is possible to calculate, using Einstein Tensor, the space time curvature around the Earth. As far as I understand, Einstein Field Equations tell us that the presence of a matter curves the space time. So space time curvature is gravity and gravity is space time curvature. So the questions are: 1) Can we get Einstein Tensor for the Earth (Ricci+1/2metric*Ricci Scalar) 2) Can we calculate the Stress-Energy-Momentum Tensor of the Earth? Basically, zero-zero component of Stress-Energy Tensor is energy density. So according to famous E=mc^2, energy density is equal to mass density times c^2. But I have no idea how to calculate the Momentum or Stress of the Earth. Thank you! Joe W.