Just playing a bit with some magnets, iron filings, and a piece of paper. I’ve wanted to take a few shots of this practical experiment for some years now. Finally I had the inspiration to do it..
All shots are negatives of the originals, since to my eyes, the magnetic field lines show better this way.
And a comparison of some homemade magnetic field lines and the aspect of some sunspot groups in H-alpha light. Note the similarities. They might not be the best examples, but they are my only ones showing similar structures on the Sun.