A vibrant retro sci-fi scene set in the 50s style, depicting a bustling diner perched on a rugged asteroid amid the cosmos, surrounded by a dazzling array of flying cars zipping through the starry void. Neon signs illuminate the exterior of the diner with dynamic, colorful lights reflecting off metallic surfaces. The interior hums with life, showcasing chrome stools and checkered floors, where space travelers gather. The intricate details of the scene include asteroids in the distance, planetary rings glowing with vibrant hues, and a panoramic view of a distant nebula, all rendered in stunning 4K resolution.