A spiral galaxy generated by Geometry Nodes. Distributed points are moved spherically by their distance and then adjusted by a distance gradient to create the "arms" of the galaxy. An additional setup with the effect of a crossing black hole.

Video demo here (Without shader) and here (With example shader).

The files contain different versions - from the simplest to more advanced.

- A 2d galaxy

- A 3d galaxy

- The Visitor setup

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NOTE

-(Since it is a concept demonstration, it is kept as simple as possible.) The GeoNodes trees are kept clean, the nodes are not contracted into node groups for easier readability and have detailed explanations. You can embellish, refine as you wish.

-(The file should be opened in Blender 3.6X)

-(Read the description text when you open the file, it has a lot of useful info)