Globular clusters, Hipparcos, and the age of the galaxy

Proc Natl Acad Sci U S A. 1998 Jan 6;95(1):8-12. doi: 10.1073/pnas.95.1.8.

Abstract

We discuss the impact of the results from the recent Hipparcos astrometric satellite on distance estimates of galactic globular clusters. Recalibrating the clusters not only implies a relatively small change in the distance to the Large Magellanic Cloud, and hence a rescaling of several estimates of the Hubble constant, but also leads to significantly younger cluster ages. Although the data are not yet conclusive, the results so far point to a likely resolution of the apparent paradox of a universe younger than its constituents, without requiring significant modifications to simple cosmological models.