Earth's variable clock

L. V. Morrison

F. R. Stephenson

pp. 165-165

in: Elisa Felicitas Arias, Ludwig Combrinck, Pavel Gabor, Catherine Hohenkerk (eds), The science of time 2016, Berlin, Springer, 2017

Abstract

Ancient Babylonian clay tablets buried for centuries beneath the sands of the desert are part of an extensive historical archive that contains vital information about the Earth's rotation from 720 BC to the present. These historical observations of solar and lunar eclipses and occultations of stars are reanalyzed to determine the error in the Earth's clock by the parameter ΔT.