Active galaxies, quasars, and supermassive black holes

OpenStax

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1 Learning objectives

2 Redshifts: the key to quasars

3 Quasars obey the hubble law

4 The size of the energy source

5 Earlier evidence

6 Key concepts and summary

Supermassive black holes: what quasars really are

1 Learning objectives

2 Observational evidence for black holes

3 Energy production around a black hole

5 Key concepts and summary

Quasars as probes of evolution in the universe

1 Learning objectives

2 The evolution of quasars

3 Codependence of black holes and galaxies

4 How a galaxy can influence a black hole in its center

5 How does the black hole influence the formation of stars in the galaxy

6 The birth of black holes and galaxies

7 Key concepts and summary

8 For further exploration

12 Collaborative group activities

13 Thought questions

14 Figuring for yourself

Source: OpenStax, Astronomy. OpenStax CNX. Apr 12, 2017 Download for free at http://cnx.org/content/col11992/1.13

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