Atomic clocks are known for their incredible precision. While most atomic clocks are far to expensive and dangerous for home use, there are now lots of clocks available that remotely connect to existing atomic clocks and allow you to experience the same time keeping precision without the radiation risk.
Now the International Space Station is upgrading its timepiece. An atomic clock constructed by EADS Astrium will arrive at the ISS in 2014, providing the most accurate timekeeping to date in space.
The New ISS Atomic Clock Will be the Most Accurate Clock in Space, Possibly the Universe.
Cesium clocks, like the one the National Institute of Standards and Technology uses to keep the official time in the U.S., generally rely on the microwave signals that electrons emit when they change energy levels to keep highly precise, consistent measurements of time (it’s estimated that the NIST’s current clock won’t gain or lose a second for more than 60 million years).