Create a portrait photograph that captures the enigmatic gaze of an ethereal being. Their piercing eyes seem to harbor galaxies, illuminated by a soft, ambient glow from their surroundings. Render this mystical figure against a backdrop of blurred, swirling cosmic nebulae and distant star clusters. Employ chiaroscuro lighting techniques reminiscent of the Baroque era to accentuate their serene expression and delicate features. The being's flowing hair, resembling stardust, trails behind as they gracefully turn away, offering a three-quarter view that evokes awe, introspection, and serene tranquility through an emotional gradient.