... Star Clusters . ... A new image from ESOт??s La Silla Observatory in Chile shows the spectacular globular star cluster Messier 4. This ball of tens of thousands of ancient stars is one of the closest and most studied of the globular clusters and recent work has revealed that one of its stars has strange and unexpected properties, apparently possessing the secret of eternal youth. ... The globular star cluster Messier 4 . ... The globular star cluster Messier 4: and the location of a curious star . ...