The European Space Agency (ESA) has launched ACES, or the Atomic Clock Ensemble in Space, to the International Space Station ...

Getting an electromechanical device to behave so well, ticking accurately to within 0.03 parts per million ... its behavior to modern ultra-high precision clock sources. There’s a lot of ...

have developed an innovative atomic clock that achieves unprecedented precision, with an uncertainty of just 2.5 parts in a quintillion. To help visualize this extraordinary precision: if this ...

ACES will gather ultra-precise data across at least ten observation windows, each lasting about 25 days during the ...