XMM Satellite Schoolpage


    Hubble Space Telescope image of a dust disc around a black hole in the galaxy NGC7022. The disk is 3700 light years in diameter and encircles a black hole with a mass 300 million times that of the Sun. The black hole is at the centre of the galaxy. (with acknowledgments to the Space Telescope Science Institute).

I became possessed with the keenest curiosity about the whirl itself. I positively felt a wish to explore its depths, even at the sacrifice I was going to make; and my principal grief was that I should never be able to tell my old companions on the shore about the mysteries I should see.

From - Descent into the Maelstrom by Edgar Allan Poe

What X-ray sources are there in the visible universe?

    There are many different kinds of known X-ray source in the visible universe. For a short account click here. Or for a more detailed explanation click here. Of these, two main types which are associated with Black Holes are quasars and X-ray binary stars.

    Sources which contain a Black Hole will be important targets for XMM which will be used to study both of these types. In the following pages we will explore both of them further.


Black holes (next page)

The University of Birmingham 

Physics and Astronomy Department, The University of Birmingham