science π NASA spots dark matter using galaxy star streams
A stellar stream from a globular cluster has been identified in the ultra-diffuse galaxy UGC 9050-Dw1, located 115 million light-years away. An international team, including Tjitske Starkenburg, detected this faint ribbon using archival Hubble Space Telescope data. Researchers estimated the galaxy's total mass and confirmed a substantial presence of unseen dark matter. This finding validates using stellar streams as a new method to map dark matter distribution in distant galaxies. Future telescopes like the Nancy Grace Roman Space Telescope will further test this technique. π