The Milankovitch Cycles

Earth's orbit does not remain fixed it varies over time. Major contributing factors to ice ages are these natural variations that occur between the Earth-Sun relationship. There are three natural cycles that have an effect on Earth's climate. The cycles have to do with Earth's axial tilt, its elliptical orbit around the Sun, and its wobble, or precession (the direction the North Pole points). These orbital parameters have cyclic occurrences (periodicities) that range from 22,000 to 100,000...