The Roman personification of the sky, equivalent to the Greek Uranus, was Caelus.
Caelus was a primordial Roman sky god whose name comes from the Latin caelum, meaning “sky” or “heaven.” Roman writers used him as the Latin counterpart of Greek Uranus, the ancient sky deity who fathered the Titans in Greek myth. Caelus could represent both the divine sky and the heavenly realm itself.
His genealogy varies among ancient authors. Cicero and Hyginus describe him as the son of Aether, the upper air, and Dies, or Day. In different traditions he fathered deities including Saturn, Ops, Janus, Mercury, and one of the figures called Jupiter. Roman myth also adapted the story of Saturn overthrowing his heavenly father to Caelus.
Caelus was not known to have a major independent cult at Rome, but he appeared in Augustan art and later Mithraic imagery. He is often confused with Jupiter because Jupiter also ruled the sky and thunder, but Jupiter was a younger ruling god; Caelus represented the primordial heavens themselves.