Lunation

[Mental Avenger]

This is a great time-lapse video showing both the eccentric orbit of the Moon and the wobble of the Moon.
https://apod.nasa.gov/apod/ap120205.html

 

[newtons_laws]

As a result of the lunar libration demonstrated in the video, over a period of time slightly more than half (59%) of the Moon's surface can be viewed from the Earth's surface. https://en.wikipedia.org/wiki/Libration