1. Astronomy 100 What’s in a Galaxy

2. Now: Go to http://beta.galaxyzoo.org/Index.aspx Register. Goal: – Understand the different types of Galaxies – Know the features of galaxies – Catch the little details about galaxies we haven’t covered yet. – Coordinate meeting at PSC next Wednesday Vocabulary: Rotation curve, Megaparsec, Hubble law, Gravitational lensing, Clusters of galaxies, Interacting galaxies, Active galactic nuclei, quasars, Seyfert Galaxies, Supermassive Black Holes, Jets – again!

3. Types of Galaxies What types of galaxies did you notice? What features did you notice in the galaxies?

4. Star Clusters Globulars – in the halo – oldsters Open – in the disk – younger

5. Hubble Tuning Fork http://www.le.ac.uk/ph/faulkes/web/images/tuning_fork_diagram.jpg

7. http://apod.nasa.gov/apod/ap080606.html

8. HUDF

10. Rotation Curve http://pppa.group.shef.ac.uk/dm/images/rota tionCurve.jpg http://pppa.group.shef.ac.uk/dm/images/rota tionCurve.jpg

11. Great DM Lecture: http://bustard.phys.nd.edu/Phys171/lectures/ dm.html http://bustard.phys.nd.edu/Phys171/lectures/ dm.html

12. Hubble’s Law Remember red shift? Everything is redshifted - more if it’s further away The Universe is Expanding.

13. Gravitational Lensing http://www.windows.ucar.edu/the_universe/i mages/ab2218_sm.jpg http://www.windows.ucar.edu/the_universe/i mages/ab2218_sm.jpg

14. Large Structure http://urania.bo.astro.it/slice_bigcluster2.jpg

15. The Mice http://www.ifa.hawaii.edu/~barnes/research/i nteraction_models/mice/index.html#highres http://www.ifa.hawaii.edu/~barnes/research/i nteraction_models/mice/index.html#highres http://antwrp.gsfc.nasa.gov/apod/ap040612.h tml

17. Active Galactic Nuclei Seyfert Galaxies (active core) Quasars (really far away, really bright) Radio Galaxies Starburst Galaxies (bright arms/disk) Powered by supermassive black holes? Jets – again!

18. Answer Now (draw or describe): Tell me about the different types of galaxies or Tell me about the common features of galaxies Define 1: Rotation curve, Megaparsec, Hubble law, Gravitational lensing, Clusters of galaxies, Interacting galaxies, Active galactic nuclei, quasars, Seyfert Galaxies, Supermassive Black Holes, Jets Before You Leave: How are you getting to PSC next Wednesday?