Rotation and revolution of the earth and its effects

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What is the Rotation of the Earth?

rotation and revolution of the earth and its effects

Earth's Rotation & Revolution: Crash Course Kids 8.1

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When watching the stars at night, they do appear to move very slowly. This is because the Earth is constantly moving. A rotation is when the planet spins around once. Revolution is when one object completes a circular path around another object. The Earth takes This is why a year is days long.

What if someone were to tell you that at any given moment, you were traveling at speeds well in excess of the speed of sound? You might think they were crazy, given that as best as you could tell you were standing on solid ground, and not in the cockpit of a supersonic jet. Nevertheless, the statement is correct.
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Imagine a line passing through the center of Earth that goes through both the North Pole and the South Pole. This imaginary line is called an axis. Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun.

This line is called the axis of rotation. Earth rotates about this axis once each day approximately 24 hours. Although you most likely already knew that fact, there is a slight complication most people are not aware of. A sidereal day is 24 sidereal hours, or 23 hours and 56 minutes on a normal clock. Our clock time is based on the earth's rotation with respect to the sun from solar noon to solar noon.



Earth Rotation and Revolution

Combined, the spinning and the revolution of the Earth causes our daily weather and global climate by affecting wind direction, temperature, ocean currents and precipitation. The immediate conditions of the atmosphere --temperature, pressure, humidity, precipitation, cloud cover and wind--at a given place and time is what creates local weather.

Earth's Rotation

Earth's rotation is the rotation of Planet Earth around its own axis. Earth rotates eastward , in prograde motion. As viewed from the north pole star Polaris , Earth turns anti clockwise. This point is distinct from Earth's North Magnetic Pole. The South Pole is the other point where Earth's axis of rotation intersects its surface, in Antarctica. Earth rotates once in about 24 hours with respect to the Sun , but once every 23 hours, 56 minutes, and 4 seconds with respect to other, distant, stars see below.

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Lecture 21: The Rotation & Revolution of the Earth

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