Credits

Animation: Motions of the Moon and the Earth
PhET Interactive Simulations, University of Colorado Boulder. Phet Interactive Simulations: Gravity and Orbits. Retrieved from: https://phet.colorado.edu/sims/html/gravity-and-orbits/latest/gravity-and-orbits_en.html

Activity: AstRoamer: Moon Track
Moon Images: NASA/Goddard Space Flight Center Scientific Visualization Studio. Retrieved from: http://svs.gsfc.nasa.gov/4000