Two-Body Orbital Motion Demo

This is a basic two-body orbital motion simulator using a fictitious planet and moon.  The planet is assumed to be significantly more massive than the moon such that the moon's position remains fixed.  The user can reset the simulation with any initial velocity that they choose.  The velocities for a circular orbit and for escape velocity are given as reference.  Based on the initial velocity, the eccentricity for the orbit is calculated and displayed allowing demonstrations of various elliptical and circular orbits (e <1) as well as parabolic (e=1) and hyperbolic (e>1) trajectories.