https://superhivemarket.com/products/sky-plus

• Procedural-realistic sky for Cycles and EEVEE. Sun, Moon, stars, atmospheric phenomena, and polar lights.
• Fully procedural generation, allowing you to control almost everything you see.
• Moreover, it's designed in such a way as to be extremely intuitive and easy to use for artists of any skill level!
• No complicated technical terminology, just the most important things!