Eye of Ra
According to legend, the Sun travels the skies as Ra drives his chariot through the heavens. Ra became connected to the Sun's presence all day long.
He was the commander of not only the sky, but the earth and beyond.
Ra is nearly always portrayed with a solar disc above his head, and often takes on the aspect of a falcon. Ra, is strictly a celestial god. It is from his position in the sky that he is able to watch over his children. On earth, Heru rules as Ra's proxy.