A colossal cosmic turtle glides through the starry void, its shell a geodesic dome of interconnected hexagons. Each hexagon is a self- contained biosphere, glowing with its own unique ecosystem. The turtle's legs are pillars of swirling nebulae, leaving trails of stardust in its wake. Atop the shell, a sprawling city of crystalline spires rises, its structures following the contours of the dome. Energy conduits pulse with light across the shell's surface, mimicking synapses firing in a neural network. The turtle's head is adorned with antenna- like structures that emit beams of light, scanning the cosmos ahead. Wide- angle view capturing the entire being against the backdrop of a colorful nebula. Cosmic- scale digital art style with a palette of deep space blacks, bioluminescent blues, and warm amber city lights