A hyperrealistic portrait of an ancient cosmic librarian, her face transforming from pale skin into intricate constellation maps with glowing celestial meridian lines and pulsing star-point nodes, her silver hair flowing as streaming nebulae in shades of violet and teal, both eyes blazing as vibrant pulsar cores emitting rhythmic beams of white and gold light, classical Renaissance composition with her hands holding a floating holographic book of galaxies, dramatic deep space lighting from behind creating luminous rim glow on her silhouette, wise ancient mood, deep indigo and cosmic violet color palette with bright white star points and gold nebula accents, masterpiece quality, 8k resolution