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• Galaxies Everywhere! The Original Hubble Deep Field
  
  
• How to see the Milky Way from Earth . . . . . (~5m; show ~2m)
  
  
• The Milky Way from Earth
  
  
• The Structure and Geometry of the Milkyway
  
  
• Main Sequence Fitting
  
  
• Henretta Leavitt and Cepheid Variables
  
  
• Lightcurve and Period Luminosity Relation for Cepheid Variables
  
  
• Cepheid Variables for Measuring Distance
  
  
• Orbits of Stars about the Galactic Center
  
  
• The Rotation Curve for the Disk of the Milkyway
  
  
• Galactic Recycling of Material
  
  
• The Spiral Galaxy M51
  
  
• The Spiral Arms are Not a Pin Wheel of Stars
  
  
• Density Waves and Spiral Arms
  
  
• Star Formation near Spiral Arms in M51
  
  
• The Spiral Arms of NGC 6733 from APOD
  
  
• Density Waves + Star Formation = Spiral Arms . . . try to slow it down.
  
  
• A Simulation of a Spiral Galaxy being Perturbed by a smaller galaxy
  
  
• The Direction of the Center of the Milkyway
  
  
• The Center of the Milky Way in different wavelengths (load MilkyWayCenterZoom.swf)
  
  
• What are those objects doing near the center?
  
  
• A Summary of Sag A* by Dennis Overbye of the New York Times 10/30/18 . . . . . .(~4m18s; if short on time, go right to clip about Andrea Ghez)
  
  
• Andrea Ghez, shared 2020 Nobel Prize in physics with Reinhard Genzel for the discovery of supermassive blackhole in the Milky Way. . . (~3m39s)
  
  
• Sag A* from the EHT in 2022

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