1	Astro 1050 Wed., Nov. 19, 2003 Today: Extra Credit Articles Homework 9 questions Review Ch. 10-13
2	Chapter 10: The Deaths of Stars -- Evolution off the main sequence (=> giant) Degenerate Matter Planetary Nebulae and White Dwarfs Binary Star Evolution (Disks, Novae, etc.) Massive Star Evolution and Supernovae Q. Massive stars cannot generate energy through iron fusion because: c iron fusion requires very high densities. c stars contain very little iron. c no star can get high enough for iron fusion. c iron is the most tightly bound of all nuclei. c massive stars go supernova before they create an iron core
3	Chapter 11: Neutron Stars & Black Holes Neutron Stars Pulsars (Radio pulsation, lighthouse model) Properties (size, density, composition) Black holes Schwarzschild Radius Properties Detection (Gravity, X-rays from Disks)
4	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
5	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
6	Exam #3 on Fri., Nov. 21 20 multiple choice (3 pts each), 10 true/false (2 pts each), 1 or 2 essay (20 pts total). Essay question(s) drawn from these topics: The Milky Way galaxy The Hubble Law Falling into a Black Hole
7	Exam #3 on Fri., Nov. 21 Sample questions. True/False: The Milky Way galaxy is a small galaxy of the Local Group. Neutron stars can be found in supernova remnants. The Magellanic Clouds are irregular galaxies. The more luminous a Cepheid variable star, the shorter its period. Elliptical galaxies evolve into spiral galaxies.
8	Exam #3 on Fri., Nov. 21 Sample questions: Multiple choice: Which sequence below gives objects in order of decreasing size? A. Red Giant -> the Sun -> the moon -> white dwarf B. The Sun -> the Earth -> neutron star -> 3 solar mass black hole C. Red Dwarf -> white dwarf -> the Sun -> neutron star D. Red Giant -> white dwarf -> red dwarf -> neutron star 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.