Lots of umbrella-like arcs of stars encircling this galaxy. These are possibly the result of a smaller, compact galaxy dropping into the larger one and swishing back and forth several times as it is stretched out into a long, complex orbit, or perhaps many orbits. It's not something I will ever claim to understand in great detail.
Data from the following proposal is used to create this image:
All channels: ACS/WFC F606W
North is 18.91° clockwise from up.