W. M. Keck Observatory - Faintest Known Star System Orbiting The Milky Way Discovered From Hawaiʻi: https://keckobservatory.org/uma3-u1/ #UrsaMajorIII #UNIONS1 #UMa3U1 #GravitationallyBound #LambdaColdDarkMatter #DarkMatter #LCDM #Cosmology #Astronomy