There is some suggestion that the Sombrero (like the Hamburger) is an edge-on spiral inside an older elliptical galaxy. Certainly the extremely extended bright halo is pretty unusual for a simple edge-on spiral. Zoom in on the dust lanes. You can cut yourself on them. Have a cruise round the outer suburbs. It's packed with background galaxies.
L 8h, RGB 1h20m each. STL11000M on PlaneWave 20" CDK on MI-750 fork.