(via APOD: 2012 October 15 - Black Sun and Inverted Starfield)
Black Sun and Inverted Starfield
Image Credit & Copyright: Jim Lafferty
Shoot a narrow-band image of the Sun, render it in B&W, invert it, and put it on an inverted starfield…and this is what you get. A rather amazing picture of the activity on our host star. You can see the filaments and prominences, the sunspots/active regions, and you can see it looks like a lot is happening.
It’s only going to keep getting crazier, too, as we approach Solar Maximum, when the magnetic field lines in the Sun are wound up about as tight as they can be.