Time Machine on a Cosmic Comet — Concept Art

On the surface of a speeding comet, a gleaming time machine rests, its hull a lattice of tempered glass, brass gears, and sapphire accents. A circular time portal along the hull glows pale blue, revealing faint glimpses of shifting epochs inside. The comet's icy tail streams behind, dust and micro-craters across its jagged surface. In the background, starfield and a distant nebula glow with magentas and teals. The scene is high-concept sci-fi concept art: cinematic lighting, dynamic perspective, shallow depth of field around the machine, film grain, ultra-detailed textures. Include solar sails retracted, coil springs, arcane runes, and a holographic interface projected above the hull. Mood: awe-inspiring, adventurous, isolated, hopeful. Style: industrial futurism, matte painting, 8K resolution.