1. Lecture 36 – Quasars and Radio Galaxies
What is going on in radio galaxies and quasars?
What accounts for the appearance of quasars (dominated by brilliant, point-like source of radiation).

2. Hints in the sky: 3C175 (quasar) and M87 (galaxy)

3. M87

4. Current Model for Luminous Extragalactic Radio Sources
Supermassive black hole (1E+09 solar masses) surrounded by huge accretion disk generates jets which penetrates tens or hundreds of kiloparsecs into space

5. At the center

6. A quasar or radio galaxy

7. Summary: the structure of a radio source

8. These sources are luminous enough to be seen at the edge of the universe