Physics 202: Introduction to Astronomy Lecture 21

1
Physics 202 Introduction to Astronomy Lecture
21

• Carsten Denker
• Physics Department
• Center for SolarTerrestrial Research

2
The Universe of Galaxies

• Hubbles classification of galaxies spirals,
  barred spirals, ellipticals, and irregulars
• Collisions
• Clusters
• Distance scale
• Planetary nebulae
• Type I supernovae

• Tully-Fisher relation
• Local group
• Virgo clusters
• Superclusters
• Hubbles law
• Cosmic expansion

3
Spiral Galaxies
4
Barred-Spiral Galaxies
5
Elliptical Galaxies
6
Irregular Galaxies
7
Tully-Fisher Relation
8
Galactic Neighborhood
9
Clusters and Superclusters
10
Hubbles Law