Rotation refers to the Earth’s spin around its internal axis, while revolution refers to the Earth’s orbital motion around the sun. The Earth rotates on its axis once every 24 hours and revolves around the sun once every... More » Science Earth Science

The sun always rises in the east because of Earth's eastward rotation on its axis. This rotation causes the sun to first be seen on the eastern horizon on any day at any given point on the planet. More » Science Astronomy

The Earth rotates at about 1037 miles per hour at the equator, and the speed at the North Pole and South Pole is near zero. The speed of the Earth's rotation increases when approaching the equator and decreases toward th... More » Science Earth Science
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According to Universe Today, the duration of a day on Earth is the time it takes for the planet to complete a rotation around its axis. The Earth’s rotation takes 23 hours, 56 minutes and 4.1 seconds. More » Science Earth Science

Earth spins on its axis due to the conservation of angular momentum. When two objects collide, unless they hit exactly head on, spin will be introduced to the system. More » Science Earth Science

The tilt of Earth’s axis and the position on its orbit around the sun due to the rotation on the axis are the properties that cause seasons, according to the National Weather Service. Seasons are opposite one another on ... More » Science Weather & Tides Weather Seasons

Astronomers theorize that over 4.5 billion years ago, Theia, an object about the size of Mars, collided with Earth to create a tilted axis. This is called "the giant impact theory." Prior to this event, the axis was stra... More » Science Earth Science