Early in the history of our solar system, something mysteriously knocked Earth slightly off its axis. So today we tilt at 23.5 degrees. But what would happen if we tilted even more? What if Earth ...

Earth rotates on its axis every 23.9 hours, defining day and night for surface dwellers. This axis of rotation is tilted 23.4 degrees away from the plane of Earth's orbit around the sun ...

Earth's obliquity is 23.4 degrees, but over history it has varied between 22.1 and 24.5 degrees approximately every 40,000 years. Precession refers to the "wobble" of this rotational axis.

The Earth is tilted approximately 23.5 degrees off a vertical axis, and because of this tilt, the most direct sunlight is aimed at the Southern Hemisphere during our astronomical winter and at the ...

Illinois is located about 40 degrees north of the equator ... The equinox is the moment when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly" equal amount ...