Globular clusters are the most massive and oldest star clusters in the universe. They can contain up to 1 million stars. The chemical composition of these stars, born at the same time, shows anomalies that are not found in any other population of stars. Explaining this specificity is one of the great challenges of astronomy.
Click here for original story, Possible first evidence for supermassive stars at the origin of globular clusters
Source: Phys.org