This name derives from the Ancient Greek “Ouranós (οὐρᾰνός) Ouraníā (Οὐρᾰνῐ́ᾱ)”, meaning “heavenly one”. Ourania, or Urania, was one of the nine Mousai (Muses), the goddesses of music, song and dance. In Classical times Ourania came to be titled the muse of astronomy and astronomical writings. In this guise she was depicted pointing to a globe with a rod. Ouranós (Οὐρανός)”, meaning “sky, heaven, the god of the heavens” was the primal Greek god personifying the sky. His equivalent in Roman mythology was Caelus. In Ancient Greek literature, Uranus, or “father sky”, was the son and husband of Gaia, Mother Earth. According to Hesiod's Theogony, Uranus was conceived by Gaia alone, but other sources cite Aether as his father.