Does the age of the universe determined from the Hubble Law agree with other estimates?
There are a few othere methods to estimate the age of the Universe. By necessity the methods give under limits. Note that the age from the Hubble parameter is 13.7 +/- 0.2 billion year. – The age of the chemical elements. Radioactive decay can be used to determine how old a given mixture of atoms is. There are several isotope with decay times as long as tens of billions of years. Various measurements result in ages of 12-17 billion year. – The age of the oldest star clusters. As the stars in the cluster were all born at the same time, the stars with the bigger masses will turn off the main sequence first. The older the cluster the more stars will have left. The turn-off point corresponds therefore to those stars that are at the end of their main-sequence life. As that lifetime can be determined from their mass which we can estimate from their luminosity and temperature, we can deduce the age of the cluster. The oldest clusters in the Milky Way have ages between 11 and 13 billion years.
