Galaxies
Building Blocks of the Universe

April 12, 2017, jeb

Outline


Discovery of Galaxies outside the Milky Way


Hubble's Galaxy Classification




Summary of Galaxy Types


Frequency of Galaxy Types


The Distribution of Galaxies in Space


Hubble's Law



Hubble's Constant



Active Galaxies


Seyfert Galaxies


Radio Galaxies


Quasi-stellar Objects


The Central Engine of an Active Galaxy


Summary

  • Standard candles are used to measure the distribution of galaxies in space
  • Majority of galaxies are members of groups or clusters
  • Hubble's Law
  • Active Galaxies
  • Quasi-stellar objects (quasars) are the most luminous bodies known
  • The Central Engine of an Active Galaxy