Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...
That is why atomic clocks form the backbone of Coordinated Universal Time (UTC) — which is used to set global time zones — and GPS (global positioning system) satellites, which rely on atomic ...
ESA's Atomic Clock Ensemble in Space (ACES) has arrived at NASA's Kennedy Space Center in Florida, United States. This cutting-edge European experiment will test fundamental physics from the ...