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What s a leap second—and why is it going away for good?

What s a leap second—and why is it going away for good?
nationalgeographic.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nationalgeographic.com Daily Mail and Mail on Sunday newspapers.

United statesJudah levineTechnology timeFrequency division in boulderNational institute of standardsCoordinated universal timeNational instituteFrequency division

Ultraprecise atomic optical clocks may redefine the length of a second

The length of a second hasn t been updated in 70 years, but ultraprecise atomic optical clocks are on track to change that.

United statesNew yorkMount everestJeffrey shermanNational institute of standardsTechnology timeNew york timesFrequency division in boulderInternational bureau of weightsNational instituteFrequency divisionInternational bureauBig bang

Ultraprecise Atomic Optical Clocks Could Help Us Redefine The Length of a Second

The definition of a second, the most fundamental unit of time in our current measurement system, hasn t been updated in more than 70 years (give or take some billionths of a second).

United statesNew yorkMount everestJeffrey shermanNational institute of standardsTechnology timeNew york timesFrequency division in boulderInternational bureau of weightsNational instituteFrequency divisionInternational bureauBig bangMp quot

Ultraprecise atomic optical clocks may redefine the length of a second

The length of a second hasn t been updated in 70 years, but ultraprecise atomic optical clocks are on track to change that.

United statesNew yorkMount everestJeffrey shermanNational institute of standardsTechnology timeNew york timesFrequency division in boulderInternational bureau of weightsNational instituteFrequency divisionInternational bureauBig bang

Satelles to Provide its STL service to NIST

Through a collaborative agreement, Satelles will provide its Satellite Time and Location (STL) PNT service to the U.S. National Institute of Standards and Techn

United statesChristina rileyMichael oconnorUs national institute of standardsFrequency division in boulderSatellite timeResilient architectureCoordinated universal timeCritical infrastructure systemsTechnical noteMonitoring stationUnited states navalFrequency divisionVice presidentGlobal positioning systemGlobal navigation satellite systems

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