Orbital Mechanics - General relativity, Newton's laws of motion, Newton's law of universal gravitation, N-body problem, Kepler's laws of planetary motion, Lift-induced drag, Wave drag, Kepler problem, Hohmann transfer orbit, Delta-v, Oberth effect, Interplanetary Transport Network, Lagrangian point, Specific orbital energy, Orbital period, Perturbation theory, Bi-elliptic transfer, Space rendezvous, Orbital speed, Retrograde and direct motion