Noun

• S: (n) celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven, welkin (the apparent surface of the imaginary sphere on which celestial bodies appear to be projected)

Adjective

• S: (adj) empyrean, empyreal (of or relating to the sky or heavens) "the empyrean sphere"
• S: (adj) empyreal, empyrean, sublime (inspiring awe) "well-meaning ineptitude that rises to empyreal absurdity"- M.S.Dworkin; "empyrean aplomb"- Hamilton Basso; "the sublime beauty of the night"