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Astronomy 100

Astronomy 100. What’s in a Galaxy. 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

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Astronomy 100

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  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

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

  7. HUDF

  8. Rotation Curve • http://pppa.group.shef.ac.uk/dm/images/rotationCurve.jpg

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

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

  11. Gravitational Lensing • http://www.windows.ucar.edu/the_universe/images/ab2218_sm.jpg

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

  13. The Mice • http://www.ifa.hawaii.edu/~barnes/research/interaction_models/mice/index.html#highres • http://antwrp.gsfc.nasa.gov/apod/ap040612.html

  14. 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!

  15. 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?

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