It looks like a neural network. Its delicate branches resemble the system of arteries and capillaries in the human body. Or it resembles the underground, thread-like networks of fungi in the forest floor.
Actually, my image shows a fascinating section of the Vela supernova remnant, a massive cloud of cosmic debris in the constellation Vela (the Ship’s Sail). These structures formed about 11,000 years ago when a massive star exploded as a supernova, hurling gigantic amounts of material into space at several thousand kilometers per second. This extremely fast shock wave raced through the surrounding interstellar medium like a cosmic wrecking ball.
When such a hot, fast shock wave encounters colder, denser clouds of gas and dust in interstellar space, flow disruptions occur, resulting in these characteristic mushroom-shaped vortices. The gas clouds are highly ionized and react extremely sensitively to magnetic fields, which thus create the extremely thin, thread-like filaments. Red usually indicates ionized hydrogen and also ionized sulfur, while the blue filaments originate from ionized oxygen.
I captured the images using the ZWO ASI 2600 MC Pro and the narrowband filters L-Extreme and Askar Colour Magic D2 (O-III and S-II). The green and blue channels of both filters were combined to represent oxygen, HOO was combined as RGB, and S was blended in as yellow.