Today, the international Earth rotation service each day of the "extra" second. According to scientists, the world clock need this amendment because of the constant deceleration of the Earth's rotation. This is not the first time humanity has resorted to using "second coordinate". The last time the adjustment was made in 2012 and caused massive failures in server systems.

Read more...

Today, the international Earth rotation service each day of the "extra" second. According to scientists, the world clock need this amendment because of the constant deceleration of the Earth's rotation. This is not the first time humanity has resorted to using "second coordinate". The last time the adjustment was made in 2012 and caused massive failures in server systems.

it is believed that in a day 86,400 seconds. It is that time is ticking ultra-precise atomic clocks. In reality, however, due to various external and internal factors on the average day 86 400,002 seconds. The appearance of "error" affected by tidal forces from the Sun and the moon, the rotation dynamics of the planet's core, as well as earthquakes, volcanoes and other natural disasters.

the Last 30 years of the last century to the day added a second almost every year. However, since the 2000s, the need for coordination is less likely to occur.

How do scientists actually know about the necessity of adding a second? Because the accuracy of atomic clocks is negligible, and the appearance of extra moments it is impossible to feel. All "blame" astronomers who are using spaced thousands of kilometers apart from each other radio telescopes to observe distant billions of light years of quasars. Different antennas are receiving signals from microscopic delay, on the basis of which calculates the actual speed of rotation of the Earth.

Usually an extra second is added to 30 June or 31 December UTC. So today, a watch must demonstrate a rather rare figure 23:59:60, or twice will flicker for a second 23:59:59. However, because of different time zones Belarusian time this will happen about three nights July 1.

Three years ago, the introduction of a second coordination has led to a massive server failure. This primarily affected systems configured for time synchronization via NTP. The problems touched upon many major resources, including LinkedIn, and Reddit, and in Australia it was necessary to detain hundreds of flights.