The European Space Agency (ESA) has launched one of its most precise science experiments to date — the Atomic Clock Ensemble ...

The atomic clock payload to be installed on the ISS's Columbus module, aims to push the boundaries of precision timekeeping ...

Modern timekeeping relies on the accuracy of atomic clocks, which revolutionized timekeeping by using the quantum behavior of atoms to measure time. Discover how these incredibly precise clocks ...

Atomic clocks record time using microwaves at a frequency matched to electron transitions in certain atoms. They are the basis upon which a second is defined. But there is a new kid on the block ...

ESA's Atomic Clock Ensemble in Space (ACES ... from the outside of ESA's Columbus module on the International Space Station, measuring time from orbit with unprecedented precision.