Why moving from astronomic to atomic time is a tricky business
Friday, January 9, 2015 - 07:30
in Physics & Chemistry
Most people would feel they can count on one day comprising the same number of hours, minutes and seconds as the next. But this isn't always the case – June 30 will be a second longer in 2015 with the addition of a leap second, added to reconcile the differences between two definitions of time: one astronomical, the other provided by atomic clocks.