Giant Tortoise Carrying World Through Galaxy

A giant ancient tortoise with a miniature world on its back, floating through a vibrant, star-filled galaxy. The tortoise's shell houses a clear dome enclosing a landscape of ancient cities, forests, and lakes. A tiny astronaut stands on the tortoise's head, gazing into the cosmos. Surrounding the tortoise are swirling nebulae, distant planets, and spiral galaxies. Photorealistic, epic scale, cosmic lighting, deep blues, purples, and oranges, with bright starlight and glowing galaxy cores, highly detailed, fantastical, surreal.