FARGO — Here, literally, is a minute detail that matters, even if it is only a fraction of a second. At the recent General Conference on Weights and Measures in Paris, representatives from world ...

For decades, the moon's subtle gravitational pull has posed a vexing challenge—atomic clocks on its surface would tick faster than those on Earth by about 56 microseconds per day. This extremely small ...

Universal Time (UT), adopted in 1928 by the International Astronomical Union, is the time standard used in astronomical almanacs, referencing the 0° longitude meridian (Greenwich). For high precision, ...

The difference between Japan Standard Time (JST) and Coordinated Universal Time (UTC) has been reduced from typically ±20 ns to less than ±5 ns by the inclusion of the optical lattice clock since ...

The tick of the world clock depends on hundreds of atomic oscillators positioned across the globe. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works ...