So this theory estimates the age of the universe to roughly 6 billion years old. There are several measures of the age of the Universe. Thus, the age of such clusters place a limit on the age of the Universe, for it must be at least as old as the objects that it contains. Thus, it is a measure of the age of the Universe. Reasonable assumptions for the value of the Hubble constant and the expansion of the Universe typically yield ages of 10-20 billion years for the age of the Universe.