Free course

Introduction to active galaxies

Free statement of participation on completion

The field of active galaxies is recognised as one of increasing importance. But how do we know there are different kinds of galaxy? What are active galaxies? How are they powered? This free course, Introduction to active galaxies, examines the different types of active galaxies and looks at the crucial role of the active galactic nucleus and the energy source at its heart.

Course learning outcomes

After studying this course, you should be able to:

  • explain how and why the optical spectrum of an active or starburst galaxy differs from that of a normal galaxy
  • explain how and why the broadband spectrum of an active or starburst galaxy differs from that of a normal galaxy
  • describe briefly the observed features of starburst galaxies and the four main classes of active galaxies (quasars, radio galaxies, Seyfert galaxies and blazars)
  • understand the evidence that indicates the presence of a compact active galactic nucleus (AGN) in active galaxies
  • explain why an AGN should emit broad lines, narrow forbidden lines and continuous radiation.

You can start this course right now without signing-up. Click on any of the course content sections below to start at any point in this course.
If you want to be able to track your progress, earn a free Statement of Participation, and access all course quizzes and activities, sign-up.

Course content