One of the great places to look for dwarf galaxies is the halo of the Andromeda galaxy (also known as Messier 31, or M31 for short), due to its relative proximity. UNIONS is so far the deepest ...
The halo, known as an "Einstein ring," encircles a galaxy 590 million light-years away ... According to ESA, the telescope will map a third of the sky and observe billions of galaxies.