Contact: Gertie Skaarup
University of Copenhagen - Niels Bohr Institute
Caption: This diagram shows the dwarf galaxy Andromeda II with the stars belonging to the stream marked in blue. Their movement show that Andromeda II is a merger of two dwarf galaxies.
Credit: Nicola C. Amorisco, N. Ho and M. Geha
Usage Restrictions: Credit Nicola C. Amorisco, N. Ho and M. Geha
Related news release: Stream of stars in Andromeda satellite galaxy shows cosmic collision