June 29 was the shortest day on record since scientists began using high-accuracy atomic clocks to measure the speed of our planet’s rotation in the 1960s, and the data came out about a month later.
The survey was conducted by a time and date website with data from the International Earth Rotation and Reference Systems Service. According to the clocks, the Earth made a complete revolution on its axis in 1.59 milliseconds less than exactly 24 hours.
For a better understanding, 1 millisecond corresponds to one thousandth of a second, or about 0.001 seconds. Although it seems insignificant, the solar day in the last 365 days of the year was -0.29 milliseconds out of 24 hours.
The decrease in the planet’s rotation is due to the tidal forces between the Earth and the Moon. This data must be studied to ensure that modern technologies, such as GPS receivers, are able to properly decode the signals.
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