NASA has made a 2 minute video about a single disk Galaxy, showing all the way from the Big Bang 13.5 billion years ago to the present time. Single disk Galaxy are a flattened circular volume of stars just like our very own Milky Way Galaxy and account for many of the galaxies in the universe.
[box_dark] NASA explains: Colors indicate old stars (red), young stars (white and bright blue) and the distribution of gas density (pale blue); the view is 300,000 light-years across. The simulation ran on the Pleiades supercomputer at NASA’s Ames Research Center in Moffett Field, Calif., and required about 1 million CPU hours. It assumes a universe dominated by dark energy and dark matter. Video by F. Governato, T. Quinn, A. Brooks and J. Wadsley[/box_dark]
Check out the video below: