Science ❯ Physics ❯ Time Measurement

Atomic Clocks

Leap Seconds Precision Timing Time Standards Signal Transmission GPS Technology Precision Technology Coordinated Universal Time Influences on Time Technological Adjustments Technological Aspects of Timekeeping Microseconds Discrepancy with Astronomical Time Precision Timekeeping Impact of Earth's Rotation Technological Implementation Caesium Clocks

NIST Restores U.S. Time After Colorado Outage Causes Microsecond Drift

A generator failure during a utility shutoff caused the microsecond drift, now corrected.

Earth Sets Second-Shortest Day of 2025 as Spin Continues to Accelerate

New Projections Confirm Record-Short Days This July and August

Earth's Spin Breaks Short-Day Records as Timekeepers Halt 2025 Leap Second