NASA’s Hubble Space Telescope has uncovered the largest known population of globular star clusters, an estimated 160,000, swarming like bees inside the crowded core of the giant grouping of galaxies Abell 1689. By comparison, our Milky Way galaxy hosts about 150 such clusters.
Studying globular clusters is critical to understanding the early, intense star-forming episodes that marked galaxy formation. The … Read the rest of this article





