The image depicts a massive black hole surrounded by a bright, swirling
disk of gas and dust. The inky blackness of the event horizon creates a
stark contrast against the luminous glow of the surrounding matter. Influence from the movie Interstellar is obvious but I tried to go for a different look.
As usual I created the wallpaper with Blender and refined it in Photoshop. It is available for free to be used as background image on your PC.