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Astronomy 100

Dive into the fascinating world of galaxies! Our upcoming meeting will focus on understanding various types of galaxies and their unique features. We’ll discuss rotation curves, Hubble's law, gravitational lensing, and the significance of interacting galaxies. Prepare to share your observations and insights on star clusters and active galactic nuclei. Don’t miss out on catching the little details about galaxies that are often overlooked. Join us next Wednesday at PSC!

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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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