Thanks to Einstein's theory of relativity, numerous tests have concluded tangible effects on how we on Earth record and measure the passing of time.

Time dilation, a captivating concept embedded in Einstein’s theory of relativity, has been experimentally validated on Earth.

Recent discoveries in the realm of physics have pointed to the possibility of time anomalies that challenge our current ...

Atomic clocks record time using microwaves at a frequency matched to electron transitions in certain atoms. They are the basis upon which a second is defined. But there is a new kid on the block ...

Within our Milky Way galaxy, in the direction of the constellation Vulpecula, a cosmic "lighthouse" named PSR B1937+21 spins ...

The way time is measured is on the edge of a historic upgrade. At the heart of this change is a new kind of atomic clock that uses light instead of microwaves. This shift means timekeeping could ...

Atomic clocks use quantum physics and the resonant frequency of atoms, like cesium, to define time with incredible precision.

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency ...

First introduced in the 1950s, atomic clocks replaced how scientists previously measured the length of a day by tracking the Earth's rotation and the position of the sun.

A radio-controlled clock has a radio inside, which receives a signal that comes from a place where an atomic clock is located, so they are always accurate, according to the National Institute of ...