Lecture 26: Spiral Galaxies
What are Spiral Galaxies? This lecture describes the basic\nproperties of spiral galaxies, their patterns of rotation and\nhow that lets us measure their masses, and the nature of the\nspiral arms as waves moving through the disk and triggering\nformation of new stars.\nRecorded 2006 February 10 in 1008 Evans Laboratory on the Columbus campus\nof The Ohio State University.