Gravity is the force that keeps planets in orbit aroundthe sun and governs the rest of the motion in the solar system. Gravity alone holds us to the earth's surface and explains the phenomena of the tides. The sun is the major source of energy for phenomena on the earth's surface, such as growth of plants, winds, ocean currents, and the water cycle. Seasons result from variations in the amount of the suns's energy hitting the surface, due to the tilt of the earth's rotatoin on its axis and the length of the day. The sun is the major source of energy for phenomena on the earth's surface.
Seasons result from variations in the amount of the sun's energy hitting the surface.