Hubble Observations Show Dark Matter's Role in Galaxy Orbits via Stellar Streams

Astronomers, using archival Hubble Space Telescope data, detected a globular cluster stellar stream outside the Milky Way for the first time. This discovery in UGC 9050-Dw1, an ultra-diffuse galaxy 115 million light-years away, confirms a theoretical prediction. The technique allows scientists to map dark matter distribution indirectly, offering a new method to understand its influence on galaxy orbits across the universe.