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Uploaded on Jul 10, 2008
Mergers of galaxies are common in their evolution. This movie shows the evolution of a galaxy with similar mass to our own Milky Way, commencing shortly after the Big Bang. The simulation is in a fully cosmological setting, according to our knowledge of Big Bang cosmology. This particular galaxy has a rich merging history, including a major merger at redshift of ~1, i.e. at a time when the Universe was almost half its current age. A large disk reforms from gas left over after the merger, and from subsequent gaseous accretion.