This wonderful movie shows the most realistic simulation yet made of the formation of the Milky Way. The simulation is named after Eris, the Greek goddess of strife and discord, chosen to reflect decades’ worth of vigorous debate on this topic.
To quote from the youTube caption: “For almost 20 years astrophysicists have been trying to recreate the formation of spiral galaxies such as our Milky Way realistically. Now astrophysicists from the University of Zurich present the world’s first realistic simulation of the formation of our home galaxy together with astronomers from the University of California at Santa Cruz. The new results were partly calculated on the computer of the Swiss National Supercomputing Center (CSCS) and show, for instance, that there has to be stars on the outer edge of the Milky Way.”