More accurate strontium-based atomic clocks are possible – and accurate to one second every 40 billion years – by emitting radiation in the visible, rather than microwave, spectrum.

The laser light used in a nuclear clock is also much higher in frequency than that required for atomic clocks. This leads to more 'ticks' per second and therefore more precise timekeeping.

Physicists are exploring thorium-229’s unique properties to create a nuclear clock so precise it could detect the faintest ...

Many modern atomic clocks use oscillations of strontium atoms rather than cesium to measure time; the most precise of these is accurate to within 1/15,000,000,000 of a second.

The atomic clock is an optical lattice that controls strontium atoms. Photo: K. Palubicki/NIST New clock just dropped, but it’ll only drop a second every 30 billion years while in operation.

Scientists have developed the most accurate atomic clock – if you ran it for twice the current age of the universe, it would only be off by one second. This could not only improve services like ...

Vector Atomic has launched a rack-mounted atomic clock. The company this week announced the launch of Evergreen-30, which it said is the world’s first fully integrated commercial optical atomic ...

A clock network would allow geodesists to compare the ticking of clocks all over the world. They could then use the variations in time to map Earth’s gravitational field much more precisely, and ...

Nuclear clocks would keep time using a variety of the element thorium, called thorium-229. Most atomic nuclei make energy leaps that are too large to be triggered by a tabletop laser.

For more about Holly's Optical Atomic Strontium Ion Clock, check out the OASIC project on NASA's website. For more about the Longitude Problem, check out Dava Sobel's book, Longitude.