Images like this were the main reason for me to get involved with Terragen back then.
I also like to make "earthly" sceneries, but to depict "realities" that exist so only "in my head", or only as bare numbers in an article, make the appeal of such renders for me: To generate possible worlds.
To see a nature scene, I can go outside to the forest or on vacation, but I can't go outside to see a triple sunset, or look at a black hole from a moon.
By the way: I like your picture very much.