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Hubble yields direct proof of stellar sorting in a globular cluster

A seven-year study with the NASA/ESA Hubble Space Telescope has provided astronomers with the best observational evidence yet that globular clusters sort out stars according to their mass. Heavier stars slow down and sink to the cluster's core, while lighter stars pick up speed and move across the cluster to its periphery. This process, called "mass segregation," has long been suspected for globular star clusters, but has never before been directly seen in action.

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Keywords: hubble, yields, direct, proof, stellar, sorting, globular, cluster, yield

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