Calibration cosmic distance scale on age globular clusters

[pstq]

Hi, Could someone enlighten me in this matter? . how the calibration of cosmic distance scale affects the determination of the age of globular star clusters? thanks a lot :)

 

[Chronos]

Cepheid and RR Lyra variable stars are the usual yardsticks used to assess the distance of globular clusters. This, however, is not particularly relevant to age determinations. See http://www.astro.caltech.edu/~george/ay127/readings/KraussChaboyer2003.pdf for further information.