| CELESTIAL | Relating to the sky or the heavens (9) |
| FIRMAMENT | The sky or the heavens (9) |
| CERULEAN | Of or relating to the sky (8) |
| GLOBE | Word once used to describe a cannonball, comet, eyeball, mass of people or almost anything spherical, later the more specific ball-shaped map of Earth or the heavens (5) |
| SERENE | From the Latin for "clear", a word used to mean fair, pure or unclouded, as of the sky or the air; calm, peaceful and tranquil; or, as part of a royal title, honoured (6) |
| BLUE | Colour of the sky or the sea (4) |
| VAST | Like the sky or the ocean |
| CAERULEUM | Dark blue, like the sky, or Britons' war paint: omnes ... se Britanni vitro inficiunt, quod ____ efficit colorem, Caes. BG 5.14 |
| METEORITE | See this crossing the sky or meet it broken on top of earth |
| COURTYARD | A wholly or partially enclosed area open to the sky, such as an atrium, patio, quadrangle or square (9) |
| AFTERGLOW | Sun's goodbye to the sky is set to reveal great flow of colour. (9) |
| YORKSHIRE | Rent subject to Sky -- or new division in England (9) |
| HYPETHRAL | Open to the sky |
| AERO | Relating to Earth's atmosphere or a flight in the sky; or, a bubbly milk chocolate bar from Nestle to buy (4) |
| AZURE | From "lapis lazuli", the cerulean of a cloudless sky or the "king's" blue of a heraldic tincture - a colour once so costly, Renaissance painters reserved it for the robes of central figures in religio |
| HEAVEN | Name for the firmament or apparent abode of God, regarded as beyond the sky; or, by extension, a place or state of supreme bliss (6) |
| OPTICS | Word, from "seen" and perhaps "eye", for the science of light from the sun and the sky; or, pub measurers on inverted bottles of gin, rum or rye (6) |
| CELESTIALSPHERE | Words used for the sky or heavens (9,6) |
| STARCHART | Map of night sky or horoscope (4,5) |
| GREY | Neutral shade of brain matter, an overcast sky or the proverbial pound of the older generation (4) |
