The Universe. Season 1, Episode 9 - Alien Galaxies (2007)

Stars: Erik Thompson, Alex Filippenko and Laura Danly


The Universe is an American documentary television series that premiered on May 29, 2007 on History. The program is produced by Flight 33 Productions and Workaholic Productions. The show features computer-generated imagery/computer graphics of astronomical objects in the universe and interviews with experts who study in the fields of cosmology, astronomy, and astrophysics.

Season 1. Episode 9: How the various structural types of galaxies form by merging with smaller galaxies is explained and simulated. The preliminary hints at the importance of dark matter in the process are mentioned.