Andromeda Hints at More Violent History than Milky Way
Santa Cruz CA (SPX) Jan 09, 2015 - A detailed study of the motions of different stellar populations in the disk of the Andromeda galaxy has found striking differences from our own Milky Way, suggesting a more violent history of mergers with smaller galaxies in Andromeda's recent past. The structure and internal motions of the stellar disk of a spiral galaxy hold important keys to understanding the galaxy's formation history ... more
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