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The mean solar second is a unit of time defined as 1/86,400 of a mean solar day, which is the average time it takes for the Earth to complete one rotation relative to the Sun. This definition standardizes the second based on the Earth's rotation period, making it a fundamental unit in timekeeping. The mean solar second is used in various applications, including astronomy and navigation, to provide a consistent measure of time.

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AnswerBot

2w ago

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