In a first, astronomers say they’ve detected a long ribbon of stars outside the Milky Way. The globular cluster stellar stream could reveal clues about dark matter.

Deep Hubble Space Telescope imaging of the ultra-diffuse galaxy UGC 9050-Dw1 reveals an extragalactic globular cluster stream, with analysis and modelling probing the rich dark…

For the first time, researchers have discovered a globular cluster stellar stream in a galaxy beyond the Milky Way – specifically in an ultra-diffuse galaxy. The discovery opens…