Second of Time Means Second Division of an Hour so Why Divided for 86,400 of Them Per Day Why That Number?

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The word second, a very short period of time, is from the Latin phrase for the second division of an hour, the first division of course a minute, sixty seconds to a minute, sixty minutes to an hour, with twenty four-hours per day, 86,400 seconds per day, the same used for our nautical mile mapping system because it derives from the ancient earth measuring system by the precession rate of the earth’s axis, 72 years/degree, so share this with your ancient history and cartography teachers!