These approximate the general relativity field equations adding extra terms to equations in Newtonian gravity. His relativistic calculations matched observation much more closely than did Newtonian theory. The lack of obstruction also eliminates the diffraction associated with cassegrain and newtonian reflector astrophotography. No new physics are necessarily introduced in applying Lagrangian mechanics compared to Newtonian mechanics. The above equations are valid for both Newtonian mechanics and special relativity. For example, Newtonian, Hamiltonian and Lagrangian classical mechanics are equivalent. The concept of a dynamical system has its origins in Newtonian mechanics. This agrees with what happens in Newtonian gravitation. Quantum physics works differently in many ways from Newtonian physics. Any mechanical process encounters limitations modeled by Newtonian physics. The animations visualise the different treatments of time in the Newtonian and the relativistic descriptions. It is obeyed by Newtonian mechanics. This was impossible under Newtonian classical mechanics. Mercury deviates from the precession predicted from these Newtonian effects. The equations of Newtonian mechanics can exhibit sensitive dependence on initial conditions.