1) Know Apparent, Visual, Spectroscopic, and Eclipsing Binary. Which are gravitationally bound?
2) Why are binary stars important in astronomy? What is 'center of mass'?
3) Are both binary stars equal distance from it? If not, who's closest? Which moves faster?
4) What is the interstellar medium? What are the four main types of nebulae?
5) What are the four observable evidences of the interstellar medium? Describe examples.
6) Why is the sky blue? Where are stars formed? What ionizes the emission nebula (HII regions)?
7) What do all stars in a stellar cluster have in common that makes them useful?
8) How is the HR diagram of a cluster used to age clusters? Track stellar evolution?
9) Why were early astronomers confused about the structure and scale of our Galaxy?
10) Where is the Sun in the Milky Way? Why is it difficult to determine our galaxy's structure?
11) What are the orbital characteristics, size and components of the Disk? The Bulge? The Halo?
12) What is a Rotation Curve? What is it good for? What is differential rotation?
13) What creates the spiral arms in a galaxy? Why do we see them? What's a density wave?
14) KNOW Pop I and Pop II Stars, their metallicity, orbits, age. Where are they in the Galaxy?
15) Globular Clusters versus Open Clusters, Disk versus Halo. Which is Pop I or Pop II?
16) Why is there a difference in metallicity between Pop I and Pop II? What IS metallicity?
17) How did the Galaxy Form? What clues did we use to create this scenario for its formation?
18) How has the metallicity (metal abundance) of our galaxy changed since its formation? Why?
19) What is happening at the center of our galaxy? What evidence is seen in the Radio, Infrared?
20) How was it first shown there were OTHER galaxies outside our own?
21) Why are Cepheids and RR Lyra Stars important? What is the Period-Luminosity Relation?

Reading from text book: pages 368 - 423; Lecture notes pages: 55 - 80