Ourania (pronounced yu-RAIN-ee-uh) is the Greek Muse of astronomy and astrology. The nine Muses are the daughters of Zeus and Mnemosyne, and they accompany Apollo in his role as God of the arts. She is usually depicted holding a sphere in her left hand and a stylus in the right. Ourania is also honored by philosophers, lifting their souls to heaven by inspiring great thoughts. She is said to have had two sons by Apollo—Linos, who personified songs of lament, and Hymenaios, who personified wedding songs. Ourania’s name, which means “heavenly,” is also seen as Urania.