Futuristic Earth and Moon is a real scale Sci-fi version of Earth and Moon that features a colonized Moon and rings around Earth and Moon. The Earth's ring is composed of asteroids, as consequence of asteroids mining, and space junk objects in orbit like broken satellites pieces, but you can make your own backstory.
Features:
Rings objects are generated using the Procedural Content Generation (PCG), it can easily be escalated to be bigger and more dense going from thousands of objects in orbit to millions.
Earth and Moon can be moved and the rings rotated, the PCG will automatically adjust to load the objects in the new position.
Most realistic looking cities lights in the night side with different light colors, intensity and scattering on the clouds like it's in real life.
Accurate Lunar craters.
Dynamic lighting from thunder storms in the night side.
Dynamic Airglow at the upper atmosphere in the night side.
The parameters are highly customizable and easily adjustable through the Blueprint, including the PCG parameters.
More relevant information on documentation