Perspective

Ages of the Oldest Clusters and the Age of the Universe

Science  22 Dec 1995:
Vol. 270, Issue 5244, pp. 1942-1943
DOI: 10.1126/science.270.5244.1942

Summary

The Hubble parameter is a measure of the size-scale and age of the universe, and its value has been a topic of intense debate. In his Perspective, van den Bergh reviews recent results obtained from observations of galaxy clusters and comments on the sources of the differing values.

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