Optical Lattice Clocks – Clocks That Are 1000 times Precise than Caesium Atomic Clocks
Japanese researchers from The University of Tokyo built two optical lattice clocks and measured the accuracy to be within one second in 30 billion years.
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Time
What Is a Leap Second and How Does It Work?
A leap second is something more than an adjustment factor. Explore the beautiful relationship between earth and moon, which led to the 'leap second' concept.