SEASONS: A TILTED EARTH ORBITS THE SUN
An inclined Earth orbits the sun showing the origin of the seasons (winter, spring, autumn (fall), summer) with solstice and equinox. Seasons arise because the Earth is tilted on its axis (yellow pole through Earth) and this tilt is maintained throughout the Earth's orbit (shown in purple) around the Sun. Consequently, the northern and southern hemispheres receive different amounts of sunlight throughout the year.
In this movie, the Earth is divided into coloured bands:
The simulated Earth tracks the months of the year which lie on a dial, like a clock face, beneath its orbit.