How Earth moves-Rotation, Revolution and much more (Reuters)

Rotation: The Earth rotates on its axis relative to the sun every 24.0 hours, producing the 24-hour day. (Reuters)

Revolution: Earth revolves about the Sun, producing the 365-day year. (Reuters)

Actually, Earth revolves in orbit around the sun in 365 days, 6 hours, 9 minutes with reference to the stars (Reuters)

Notably, the 6 hours, 9 minutes adds up to about an extra day every fourth year, which is designated a leap year, with the extra day added as February 29th. (NASA)

NASA says that while "Rotation" refers to an object's spinning motion about its own axis, "Revolution" refers to the object's orbital motion around another object. (Reuters)

The speed at which the Earth is moving ranges from 29.29 to 30.29 km/s. (Reuters)

Earth's orbit is elliptical and reaches its closest approach to the sun, a perihelion of 147,090,000 km, on about January fourth of each year. (NASA)

Aphelion comes six months later at 152,100,000 km. (NASA)

Amazingly, human activity can affect Earth. According to NASA, the Three Gorges Dam in China slows down the rotation of the Earth by 0.06 microseconds! (Reuters)

This is due to the enormous amount of water being held up by the dam. (Reuters)

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