1. Lecture 1: Introduction to Cosmology Astronomy 5: The Formation and Evolution of the Universe Sandra M. Faber Spring Quarter 2007 UC Santa Cruz

2. The Andromeda galaxy: big sister of our Milky Way 2 million light years away 60,000 light years across x

3. The Andromeda galaxy: big sister of our Milky Way 2 million light years away 60,000 light years across

4. Andromeda is composed of billions of stars

5. Spirals are flattened, rotating disks seen at various inclinations

8. Our Milky Way is a spiral. We live in its disk. x

9. The Milky Way as seen at dark sites

10. The constellation Orion against the backdrop of the Milky Way -- a sense of scale

12. The Orion nebula imaged by the Hubble Space Telescope

13. A major recent discovery: color bimodality