Hubble Data Reveals First Globular Cluster Stellar Stream Beyond the Milky Way, Offering New Dark Matter Insights

Astronomers have detected the first stellar stream from a globular cluster outside the Milky Way, located in the ultra-diffuse galaxy UGC 9050-Dw1, 115 million light-years away. This discovery, made using archival Hubble Space Telescope data, provides a novel method for mapping dark matter distribution in distant galaxies and confirms a long-held theoretical prediction.