Review Chapter 12: Milky Way

		The discovery of the Galaxy
			Variable stars as distance indicators
			Globular clusters
		The size and overall structure of the Galaxy
		21 cm Hydrogen emission
		Motions in the galaxy
			The Halo
			The Disk population
				Spiral Arms
			The Nuclear Bulge
			The Rotation curve and the Galaxy’s mass
		The origin of the galaxy
		The Galactic Center

Chapter 13: Galaxies

	Family of Galaxies
		Classification
	Properties of Galaxies
		Distance; The Hubble Law
		Size and Luminosity
		Mass (including Dark Matter)
	Evolution of Galaxies
		Clusters
		Mergers

Chapter 14: Galaxies with Active Nuclei

	Discovery of Active Galactic Nuclei (AGN)
		Seyfert Galaxies and Radio Sources
	The Unified Model
		Black Holes in Galaxies, disks, orientation, +
	Quasars
		Distances and Relativistic Redshifts
		Quasars as extreme AGN
		Evolution of Quasars/Galaxies
		Gravitational Lensing

Chapter 15: Cosmology

	The Hubble Expansion – review+
	Olber’s paradox
	The Big Bang
	Refining the Big Bang
	Details of the Big Bang
	General Relativity
	Cosmological Constant
	Origin of Structure

Exam #3 on Mon., April 19

	Sample questions.
		The assumption of Isotropy states that
			A. The universe looks the same at all epochs.
			B. The universe looks the same from all locations over large enough distances.
			C. The universe looks the same in all locations over large enough distances.
			D. All of the above.
			E. None of the above.

Exam #3 on Mon., April 19

	Sample questions.
		In order to determine the age of the universe, we require
			A. The universe to be flat.
			B. The amount of dark matter to be determined.
			C. The redshifts of galaxies in the Local Group to be measured.
			D. An accuration temperature of the background radiation.
			E. The Hubble Constant and the density of the universe to be determined.
		The center of our galaxy lies in the direction of the constellation of
			A. Ursa Minor.
			B. Ursa Major.
			C. Sagittarius.
			D. Orion.
			E. Andromeda.