AST101 The Evolution of Galaxies. Virgo Cluster Collisions of Galaxies Outside of Clusters (the field), most galaxies are spiral or irregular In dense.
Galaxies with Active Nuclei Chapter 17. You can imagine galaxies rotating slowly and quietly making new stars as the eons pass, but the nuclei of some.
Class 25 : Active galactic nuclei Discovery of AGN (3C 273). What are AGN? Radio galaxies. AGN and colliding galaxies.
