Published online by Cambridge University Press: 30 March 2016
Within the framework of a model cosmology, the ages of the globular clusters should provide upper limits to the value of Hubble’s constant. Should both the ages and H be known to high accuracy, we may ask if standard comsological models are adequate. This paper will summarize recent results obtained by many astronomers for the ages of the globular clusters, how large the uncertainties are thought to be, and will suggest some further work.