This is only slightly related, but you should get yourself Space Engine. It's a realistic Universe simulator, representing the entire 1:1 scale observable universe from a combination of real astronomical data and scientifically-accurate procedural generation algorithms. All types of celestial objects are represented: galaxies, nebulae, stars and star clusters, planets and moons, comets and asteroids. Known celestial objects are represented using real data from astronomy catalogues, while regions of space not yet cataloged feature procedurally generated objects. Best part - you can visit and explore almost any of them.
The newest version is paid, but earlier versions are free to download on the official website:
https://spaceengine.org/