Contact: Barbara K. Kennedy
Caption: The aging of star clusters is linked more with their lifestyle than with how old they actually are, according to a new NASA/ESA Hubble Space Telescope study coauthored by Penn State astronomer Steinn Sigurdsson and other scientists, and led by Francesco Ferraro of the University of Bologna in Italy. The research reveals, for the first time, that each star cluster has its own internal clock, some of which are ticking slower than others. This image gallery shows 12 globular clusters ranked in order of increasing dynamical age as measured from the observed distribution of their blue-straggler stars.
Credit: F. Ferraro (UniBO)
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Related news release: How stars look young when they're not: The secret of aging well