A whimsical, ultra-detailed concept art illustration of a floating glass ‘pocket universe’ gadget the size of a vintage pocket watch, its transparent crystal shell revealing miniature galaxies, tiny orbiting planets and glowing nebulae inside, surrounded by intricate brass clockwork rings and softly humming anti-gravity coils, hovering above a wooden inventor’s workbench covered in blueprints and scattered tools, warm cinematic lighting, shallow depth of field, highly polished, 8k resolution, no text, no watermark.