In earlier Greek mythology, the sun was personified as a deity called Hêlios (Greek for "the sun"), whom Homer equates with the sun titan Hyperion. Other sources say Helios is Hyperion's son by his sister Theia. Helios was seen driving a fiery chariot across the sky. He has two sisters, the moon goddess Selene and the dawn goddess Eos. Many think that Apollo becomes the Olympian "sun god", but this idea is mostly based on speculation and assumption.
The Greek name for the Sun. Also used, in altered forms, as a prefix or suffix to indicate a quantity related to the Sun, such as perihelion, aphelion, heliosphere, spectroheliogram, etc.
(Greek mythology) ancient god of the sun; drove his chariot across the sky each day; identified with Roman Sol