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.

A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known ...

Atomic clocks are already in use in space, and we are reliant on the technology in our day to day lives. GPS satellites, for example, use atomic clocks to measure location extremely precisely.

Best value, best overall. Compact clock has a snug case that converts into a stand. Buttons are hard to press, but there are only four of them (not including snooze). Takes one lithium-cell ...

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.

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.