World's Most Precise Clock Achieves 19-Decimal Accuracy with Aluminum Ion Technology

World's most accurate clock requires a 2-mile laser beam

It measure a second down to the 19th decimal.

World's most precise clock achieves 19-decimal accuracy with aluminum ion technology

There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and Technology (NIST) have improved their atomic clock based on a trapped aluminum ion. Part of the latest wave of optical atomic clocks, it can perform timekeeping with 19 decimal places of accuracy.

NIST Ion Clock Sets New Record for Most Accurate Clock in the World