The new MLP movie looks nice. It also contains math in a scene:
Analysis of the Fancy Mathematics
On the left, it shows the apparent angle of a distant sphere, which can be any sphere, such as the sun, the moon, or a planet.
The two pictures at the top make up an explanation of aurora: "magnetic field of earth produces aurora". It's the clearest picture in the whole board. Not much to say about it.
To learn more, check this video.
The circle in the center is a Horizontal Coordinate System centered on the stage in Canterlot.
The two angles labelled on the graph are the Solar Elevation and Lunar Elevation. Basically, Solar Elevation is the altitude of