Milky Way formed slowly and quietly and NOT as a result of a violent collision
Astronomers used the European Southern Observatory Very Large Telescope This ground based observatory let them study a cross-section of the UGC 10738 UGC 10738 is a galaxy of a similar size to the Milky Way galaxy and a similar age They found evidence of thin and thick discs within the galaxy like the Milky Way This suggests these disc formations are common and not the result of violent galactic collisions in the deep past of the Milky Way, the team suggested
Source: dailymail.co.uk