Old English heofonlic "celestial; divine;" see heaven + -ly (1). Meaning "beautiful, divinely lovely" is late 14c., often (though not originally) with reference to the celestial "music of the spheres;" weakened sense of "excellent, enjoyable" is first recorded 1874. The heavenly bodies (stars, planets, etc.) attested from late 14c. Related: Heavenliness.
fem. proper name, from French céleste (11c.) "sky, heaven," from Latin caelestis "heavenly" (see celestial).
name of the Muse of astronomy and celestial forces, from Latin Urania, from Greek Ourania, fem. of ouranios, literally "heavenly," from ouranos (see Uranus).