The sky is an edited sphere with a procedural node set up that adds stars, clouds that can be controlled by an empty, and also creates a ring around the moon. The moon is the only thing that is not procedurally made. You can move the moon around and it will stick to the sky and the ring around it will move with it. There is an area light parented to the moon if you want to use Eevee. There is also a plane that has a procedural water set up on it. The water looks like it moves. Enjoy!