A spiral galaxy generated procedurally by Geometry Nodes. Distributed points are moved spherically 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), and here.

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

- A 2d galaxy

- A 3d galaxy

- The Visitor setup

The GN setup makes it superfast and lightweight, also, procedural and easy to customize (like number of stars, density, rotation speed)

The file is optimized for and rendered in Eevee (Render Viewport animation). Of course, you can set up any renderer you wish.

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NOTE

-(Since it is a concept demonstration, it is kept as simple as possible.) The GeoNodes trees are kept clean for easier readability and have detailed explanations. Everything is built from the base. The point of these setups is to provide a base core of the concept, node from node, instead of contracting all into node groups with exposed settings, which makes everything harder to read and dissect.

You can embellish, refine as you wish based on the core or realize your own ideas.

-Read the text description, it has a lot of useful info !