In 2016 in synchronization with the rotation of the earth "leap seconds" requires responsible for measuring the time in the world, second, using cesium atoms to determine the exact time , the most accurate on the clock just before the second had very good in the determination of how much has been said to be the world, and it will never get out of sync at least 300 million years. However, many seconds of the question in the year is less certain. International Services in charge of international cooperation (UTC), the earth rotation and reference systems, the year world clock that determines whether "leap seconds" or is required to ensure that two times synchronized with the rotation of the earth It is, and this week, the scientists in 2016 decided to require one or more of the second. Add This is, in front of the seat of the stroke to guide during the 12 hours, 00 minutes and 00 seconds the morning, then, that midnight clock read 59 minutes and 59 seconds 11 pm December 31, 2008, in 11:59:60 in the afternoon it is 2017. Rotation of the Earth is about 60% of once per second, based on the observation that lose find in the current atomic clock, additional leap Monday as a moving clock catch up. Rotation is a small part, slower than the time of the atom, but not the same braking action of the reason ocean tide. On June 30 or December, Paris and since the base IERS evaluation in order to add twice leap Monday year, depression even without Itemoi, is equivalent to a loss of about 2 milliseconds per day 31. US Navy observation explains, "[a] FTER 500 days, the difference between the time of Earth rotation time and the atom can be in one of the 2. instead, this enables a leap occurs second will be the second time in order to bring together. " When the leap second is due to the observatory, it will be added to the 26 times since the beginning of the practice in 1972.
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