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標題: Last year the world was spinning faster [打印本頁]

作者: jira13578    時間: 2021-8-6 13:01     標題: Last year the world was spinning faster



The year 2020 ทางเข้าเกม has just passed. It was a year filled with many extraordinary events. Even the rotational speed of the Earth was increasing. At the highest level ever recorded in half a century.

International Service Agency for the World Reference and Rotation System (IERS) in Paris, France. Indicates that last year the Earth had an astronomical date. The astronomical time is the shortest and fastest elapsed since 1960 to 28 days, as the Earth rotates several milliseconds faster on average.

Even though it sounds scary However, more accurate satellite measurements in the 1970s revealed that the Earth tends to spin slightly slower over the long term.


The world was spinning faster than before last year. And it may still spin faster this year. Scientists are preparing to consider using a "leap second" to improve the accuracy of timekeeping in 2020 and 2021. It may take a negative leap second for the first time in history.

A leap second is the number of seconds that are adjusted up or down. To maintain the Coordinated Universal Time (UTC) standard that people around the world use to measure time accurately.

The rotation of the Earth allows starlight to be seen in photographs of the night sky as circular lines.

UTC is a time unit based on the Earth's rotation. using highly accurate atomic clocks as a measuring tool. But because the world has various physical changes naturally. As the tectonic plates move, the wind and ocean currents change, the atmospheric pressure increases or decreases each year. This can make the Earth's rotation rate slightly slower or faster, causing inaccuracies in the UTC time.
作者: christian398    時間: 2021-8-6 16:31

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作者: twman19    時間: 2021-9-12 17:50

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