| These Milankovitch cycles are tied to Earth's wobbly orbital axis, its oscillating axial tilt, and its orbital eccentricity. |
| The axial tilt of Uranus is 98°, so effectively the planet is now spinning in a direction opposite to its orbital motion around the sun. |
| Paleontological evidence and computer simulations show that Earth's axial tilt is stabilized by tidal interactions with the Moon. |
| Uranus' unique attribute, though, is that its axial tilt is 98° so that it orbits the Sun on its side every 84 years, presenting first one pole towards the Sun and then the other. |
| The angle of Earth's axial tilt is relatively stable over long periods of time. |
| Due to Earth's axial tilt, the amount of sunlight reaching any given point on the surface varies over the course of the year. |
