video G1: The Gravitational Field Strength. This video is on the gravitational field due to a planet.
video G2: Satellites in Circular Orbit. This video details the physics of satellites in circular orbit around another object.
video G3: Kepler's 3 Laws of Planetary Motion.
video G4: Elliptical Orbits and the Conservation of Energy
video G5: Elliptical Orbits and the Conservation of Angular Momentum
Video G6: Escape Velocity. explains how you calculate an object's escape velocity for a given planet.
video G7: The Physics of Binary Star Systems