The average solar day It is 86,400 secondsbut in the last 40 days, scientists have detected the two shorter since there is registration (60 years). The exact dates are June 28thwhen saved 1.59 milliseconds; and the July 26, 1.5 milliseconds. The reason? The moon force.
As explained Antonio Riosa physicist from the Higher Council for Scientific Research (CSIC), due to the closeness of the only natural satellite of the Tierrait keeps part of the energy it uses to rotate. Of course, this variation is so insignificant that there is no need to worry about the convention of days, hours, months and years.
Chandler’s Bamboleo
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Another reason not to be alarmed is that the earth rotationin fact, it diverts many times of 24 hours fair. It is explained by a phenomenon known as Chandler’s hula hoop. Astronomer Seth Carlo Chandler discovered a small irregularity on the wobble of earth’s axis, whose exact origin has not yet been determined. Its duration is 433 days and it can cause a displacement of up to nine meters from the expected position at a given moment.
That Registration extremely exact from length of days is done through the atomic clocks, which we find scattered all over the world (there are up to 400 of them). Without them, many industries and technologies would go under, as they are essential in helping to define what time it is to nanosecond precision. Thanks to cesiuma gray metal that melts in your hands, the International System of Units (SI) established that one second is the time that it takes an atom to oscillate exactly. This process occurs inside atomic clocks.