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One Earth day is equal to 23 hours, 56 minutes and 4.1 seconds (the time required to complete a single rotation of the Earth).
The total circumference of Earth's orbit is a little over 584 million miles. Although an Earth day is equal to 24 hours, the planet actually completes a rotation around its axis, which is known as a sidereal orbit period, once every 23 hours, 56 minutes and 4.09 seconds.