Theia was the Titaness associated with sight and the shining sky. Her name and alternate name Euryphaessa, often translated as “wide-shining,” connect her with brightness, radiance, and the ability to see.
Theia was one of the children of Uranus and Gaia. In later Greek myth, she became the consort of her brother Hyperion. Their children formed a family of heavenly lights: Helios was the Sun, Selene was the Moon, and Eos was the Dawn. Through them, Theia became a maternal figure behind the visible lights of the sky.
Her association with sight reflects an ancient symbolic idea that vision depends on light. Theia was also connected with brilliance and precious metals, especially gold, whose shine was treated as a terrestrial reflection of sunlight. Unlike many Olympian gods, she appears relatively rarely in surviving myths.
Hyperion is the common mix-up because he is Theia’s partner and is himself linked with heavenly light. Phoebe also means “bright” and has lunar associations, while Hemera and Eos personify day and dawn rather than Theia’s broader power of radiant sight.