It had been believed, up until a few years ago, that the Earth's rotation was slowing down as a result of numerous subsequent atomic clock measurements made since 1973.
It had been believed, up until a few years ago, that the Earth's rotation was slowing down as a result of numerous subsequent atomic clock measurements made since 1973.
In order to account for the slower spin, the International Earth Rotation and Reference Systems Service (IERS) had even started to occasionally add leap seconds (it last happened on December 31, 2016).