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The planet Earth completes a complete revolution of the Sun (year) in 365.25 days, each of which is 24 hours or 86,400 seconds in duration. For its mean orbital circumference of 292 million miles (470 million km), the Earth travels at an average orbital speed of 66,622 mph (107, 218 km/hr or about 30 km/sec).

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16y ago

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