This movie shows how the earth would look from the sun. We begin on the first day of spring, so the earth's equator is at the center of the picture. As we go through one year, notice how first the northern and then the southern hemispheres are tilted toward the sun. This tilting causes the seasons, not the distance between the earth and the sun. Notice also that the size of the earth seems to change because the earth's orbit is not a circle. We are a little closer to the sun in January, so the earth would look bigger then.
