Generate a high-quality science-fiction image of a vast futuristic city on an alien planet at night.

Generate a high-quality science-fiction image of a vast futuristic city on an alien planet at night. Show towering glass skyscrapers, glowing holographic advertisements, flying vehicles, and crowded neon-lit streets. Place a lone astronaut in a weathered spacesuit in the foreground, looking toward an enormous ring-shaped spacecraft hovering above the city. Include two moons and a colorful nebula in the sky. Use cinematic composition, dramatic lighting, atmospheric fog, realistic textures, epic scale, an ultra-wide-angle perspective, sharp focus, and highly detailed 8K science-fiction concept-art quality.