A clock is an instrument for measuring time and for measuring time intervals of less than a day. Those used for technical purposes, of very high accuracy, are usually called chronometers. The clock in its most common modern form (in use since at least the 14th century) displays the hours, minutes and, sometimes, seconds that [...]
Atomic Clock TimesWednesday, December 27th, 2006
This article provides useful, detailed information about Atomic Clock Times.
Time measured by rotation of Earth is not uniform when compared with time kept by atomic clocks. It was not always so, and atomic clocks underwent changes before giving us accurate time. The first atomic clock, built at the U.S. National Bureau of Standards in 1949, [...]