"Faintest Satellite in Milky Way Unveiled by Astronomers"

Astronomers using the Ultraviolet Near Infrared Optical Northern Survey (UNIONS) have discovered Ursa Major III/UNIONS 1, the faintest known satellite of the Milky Way. This compact object has a total absolute V-band magnitude of +2.2 mag and contains only about 50-60 stars. It is estimated to have a very low total mass of about 16 solar masses. Further observations are needed to determine whether Ursa Major III/UNIONS 1 is a dwarf galaxy or a star cluster and to understand its true nature.