U.S. Naval Observatory: World's most accurate clocks

Posted by David Eicher
on Friday, May 2, 2014

By David J. Eicher

The world’s most accurate clocks: eight rubidium fountain clocks define timekeeping on Earth and are the most accurate clocks in the world, more so than their predecessors, the cesium clocks located across the hallway, U.S. Naval Observatory, Washington, D.C., April 28, 2014.

Related blog: Behind the scenes at the U.S. Naval Observatory

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