A Baroque-inspired tableau of a futuristic space opera orchestra performing amidst the grandeur of a celestial cathedral, where musicians are depicted as AI beings with glowing, translucent instruments, the cathedral's stained glass windows projecting holographic constellations onto their iridescent robes, the scene illuminated by a cosmic ray of light filtering through swirling nebulae, creating an ethereal blend of classical opulence and sci-fi fantasy, capturing the harmonious convergence of tradition and innovation in a visually stunning spectacle.