For a good visualisation of the galactic evolution from the early universe, as well as the various intergalactic collisions described in this article, check ou

For a good visualisation of the galactic evolution from the early universe, as well as the various intergalactic collisions described in this article, check out this video: http://www.tng-project.org/movies/tng/tng50_single_galaxy_formation_g3_2160p.mp4 http://www.tng-project.org/movies/tng/tng50_single_galaxy_fo... From the IllustrisTNG[1] cosmological simulation project: > Formation of a single galaxy "g3", tracked through time from high redshift until the present day. This relatively "average" TNG50 galaxy will be just slightly less massive than our own Milky Way at z=0. We include a large-scale view (lower left), and zoomed in views of the central gas and stellar structures (lower right), while the main panel shows projected gas density. At z=1.5 we pause and rotate around the system, showing in order: gas metallicity, gas velocity field, and H-alpha luminosity, before continuing. What is a small dwarf at high redshift (108.3 solar masses in stars at z=4) transitions, at late times, into a large stable disk with a quasi-steady star formation rate of a few solar masses per year. [1]: https://www.tng-project.org/about/ https://www.tng-project.org/about/