“This is a puny cluster of stars—less than a few thousand in total—but it has big implications beyond its local area of the Milky Way,” says primary discoverer Adrian Price-Whelan, a research fellow at the Flatiron Institute’s Center for Computational Astrophysics about an unexpected cluster of young stars of extragalactic origin in the outskirts the … Continue reading Alien Cluster of Young Stars Invading the Milky Way