1. AST 101 The Realm of the Nebulae

2. Meet the Neighbors

3. Large Magellanic Cloud

5. Small Magellanic Cloud

6. The Local Group

7. Contents of the Local Group About 47 galaxies 3 large galaxies 44 smaller galaxies

8. The Local Group

9. Big Galaxies M31 - Andromeda

10. Big Galaxies M33 Triangulum

11. IC 10 M 32 Sextans A Leo I

12. Morphological Classification (Hubble Types) Spirals –Barred Spirals Ellipticals –Dwarf Ellipticals Irregulars

13. Spirals Sa Sb Sc Sd

14. Barred Spirals SBa SBb SBc SBd

15. Properties of Spirals Sa  Sb  Sc  Sd Bulge decreases in prominence Spiral arms increase in prominence Dust/gas content increases Prominence of population I increases Star formation rate increases

16. Ellipticals E0 E2 E6 S0 spheroidal galaxy

17. Properties of Ellipticals E0  E7 Flattening increases S0: has a disk, but no arms Little, if any, gas and dust Mostly the old stellar population (pop II)

18. Tuning Fork Diagram