Here's something for all fans of Earth's beautiful natural satellite and it is really cool! This NASA animation shows the phases of our Moon for the entire year of 2013.
As you watch the animation, you'll notice that the Moon seems to rock back and forth, tipping and tilting over the course of every month. That action is due to the Moon's orbit being elliptical and slightly tilted with respect to the Earth's equator. The motion is called libration, and because of it we see the Moon from a slightly different angle each day