Tonight is the evening to Fall Again 🕰️🍂 as all of us get an additional hour of sleep. However do you know about Leap Second?
Based mostly on two alternative ways we measure time (precisely): atomic and astronomical. Often the 2 clocks change into out of sync (as a result of time is relative?) and we have to insert a leap second. Actually attention-grabbing article from the New York Instances:
For 50 years, the worldwide neighborhood has rigorously and precariously balanced two alternative ways of preserving time. One methodology, primarily based on Earth’s rotation, is as previous as human timekeeping itself, an historic and common sense reliance on the place of the solar and stars. The opposite, extra exact methodology coaxes a gentle, dependable frequency from the altering state of cesium atoms and supplies important regularity for the digital gadgets that dominate our lives.
The difficulty is that the occasions on these clocks diverge. The astronomical time, referred to as Common Time, or UT1, has tended to fall a number of clicks behind the atomic one, referred to as Worldwide Atomic Time, or TAI. So each few years since 1972, the 2 occasions have been synced by the insertion of leap seconds — pausing the atomic clocks briefly to let the astronomic one catch up. This creates UTC, Common Coordinated Time.
Learn extra and study extra about Common Time [UT1] and Worldwide Atomic Time [TAI]
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