A New Discovery in the Andromeda Halo: The Faint Dwarf Galaxy Pegasus VII

Astronomers have discovered Pegasus VII (Peg VII), a faint ultra-faint dwarf galaxy near Andromeda (M31), using data from the UNIONS survey and follow-up imaging. Peg VII is dim (MV = -5.7), extended (177 pc), and located 331 kpc from M31, possibly beyond its dark matter halo. Its elongated shape suggests a past interaction with M31, but it could also be on its first infall. This discovery hints at more hidden dwarf galaxies in the Local Group, awaiting detection in deep surveys.