  The relics of disrupted satellite galaxies around the Milky Way and Andromeda
have been found, but direct evidence of a satellite galaxy in the early stages
of being disrupted has remained elusive. We have discovered a dwarf satellite
galaxy in the process of being torn apart by gravitational tidal forces as it
merges with a larger galaxy's dark matter halo. Our results illustrate the
morphological transformation of dwarf galaxies by tidal interaction and the
continued build-up of galaxy halos.
