What are Active Galaxies?

  • Exhibition Text

    • An active galaxy emits up to thousands of times more energy than a normal galaxy. Most of this energy is released not in visible light but in other wavelengths, from radio waves to gamma rays. In addition, long jets of gas can spew forth from the galaxy at nearly the speed of light. This activity is driven by a supermassive black hole in the galaxy’s nucleus.

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  • For Educators

    • Topic: Astronomy

      Subtopic: Galaxies

      Keywords: Astrophysics, Active galaxies, Force and energy, Galaxies, Black holes (Astronomy)

      Audience: General

In This Section

Kinetic Model

Kinetic Model

This kinetic model illustrates the accretion disk around a black hole.