1. Physics 231: Section 4 Stellar Evolution http://mimas.physics.drexel.edu/phys231 1Phys 231, Topic 4: Stellar Evolution

2. The Milky Way at 21 cm Phys 231, Topic 4: Stellar Evolution2 Map of neutral hydrogen (e.g. H I Clouds).

3. Molecular Clouds Phys 231, Topic 4: Stellar Evolution3 The Horsehead (IC434) Nebula, part of the Orion complex. Note that these are most easily seen as absorption.

4. H II Regions Phys 231, Topic 4: Stellar Evolution4 M8, the “Lagoon Nebula.”

5. The formation of the sun Phys 231, Topic 4: Stellar Evolution5

6. The Orion Nebula Phys 231, Topic 4: Stellar Evolution6

7. Evolution of the Sun Phys 231, Topic 4: Stellar Evolution7

8. The Structure of a Red Giant Phys 231, Topic 4: Stellar Evolution8

9. Horizontal Branch Star Phys 231, Topic 4: Stellar Evolution9

10. Asymptotic Giant Branch Star Phys 231, Topic 4: Stellar Evolution10

11. The Planetary Nebula NGC 6720 Phys 231, Topic 4: Stellar Evolution11

12. Liouville’s Theorem Phys 231, Topic 4: Stellar Evolution12

13. Evolution of high mass stars Phys 231, Topic 4: Stellar Evolution13

14. The “onion-skin” model Phys 231, Topic 4: Stellar Evolution14

15. Supernova 1987A Phys 231, Topic 4: Stellar Evolution15 BeforeAfter

16. Pulsars Phys 231, Topic 4: Stellar Evolution16