Pictured is a time-lapse N-body simulation that illustrates the power of computational techniques. This simulation models the dark matter and stellar components of two disk galaxies as they interact and merge. Only the stellar component is shown in this simulation of a minor merger with M31 (the Andromeda galaxy) covering a time scale of 3 Giga years. Mergers, such as illustrated, play an important role in the evolution of galaxies. Learn More.
Photo Credit: Mark Fardal