I had ideas recently of making cosmology in my fantasy world, and to discuss alternate realities and the constellations of the planet of my fantasy world. I love space science, the study of stars being born and reborn, planets and their atmospheres , the shaping of constellations, comets and everything else you can think of. I saw this done by J. R.R Tolkien, creating a cosmology so distinct and beautiful. Such as a briefly mentioned topic has so many wonders. One of the many reasons why i wish he was able to do more. I had plenty of ideas to shape the universe of my fantasy novel but i was wondering if readers would have the slightest interest and scope that would make a difference. I thought making my own stars and orbiting moons would help uplift the scope and depth of my fantasy universe. Does this have valid place in fantasy? A few would say it's not important, but i just wanted the valid opinion from fellow writers on here.