This is the thirty-ninth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video discusses active galaxies, quasars, the massive black holes at the center of galaxies, and galaxy clusters.
From the video description:
Table of Contents:
- Black Holes at the Center of Galaxies 2:26
- Galaxies Are a Part of Small/Large Clusters 9:47
- The Milky Way is Part of the Local Group 6:45
- Galaxy Clusters Clump Together to Create Superclusters 11:03
- Hundreds of Billions of Galaxies 12:39