The apparent surface of the imaginary sphere on which celestial bodies appear to be projected.

synonyms: celestial sphere, empyrean, firmament, heavens, sphere, vault of heaven.

Roget 318: world, creation, nature, universe; earth, globe, wide world; cosmos; kosmos^†; terraqueous globe^†, sphere; macrocosm, megacosm^†; music of the spheres.    heavens, sky, welkin^†, empyrean; starry cope, starry heaven, starry host; firmament; Midgard; supersensible regions^†; varuna; vault of heaven, canopy of heaven; celestial spaces.    heavenly bodies, stars, asteroids; nebulae; galaxy, milky way, galactic circle, via lactea [Lat.], ame no kawa [Jap.].    sun, orb of day, Apollo^†, Phoebus; photosphere, chromosphere; solar system; planet, planetoid; comet; satellite, moon, orb of night, Diana, silver-footed queen; aerolite^†, meteor; planetary ring; falling star, shooting star; meteorite, uranolite^†.    constellation, zodiac, signs of the zodiac, Charles's wain, Big Dipper, Little Dipper, Great Bear, Southern Cross, Orion's belt, Cassiopea's chair, Pleiades.    colures^†, equator, ecliptic, orbit.    [Science of heavenly bodies] astronomy; uranography, uranology^†; cosmology, cosmography^†, cosmogony; eidouranion^†, orrery; geodesy etc. (measurement) 466; star gazing, star gazer^†; astronomer; observatory; planetarium.    ... show more

Roget 338: air etc. (gas) 334; common air, atmospheric air; atmosphere; aerosphere^†.    open air; sky, welkin; blue sky; cloud etc. 353.    weather, climate, rise and fall of the barometer, isobar.    [Science of air] aerology, aerometry^†, aeroscopy^†, aeroscopy^†, aerography^†; meteorology, climatology; pneumatics; eudioscope^†, baroscope^†, aeroscope^†, eudiometer^†, barometer, aerometer^†; aneroid, baroscope^†; weather gauge, weather glass, weather cock.    exposure to the air, exposure to the weather; ventilation; aerostation^†, aeronautics, aeronaut.    ... show more

Dutch: omgeving, bol, uitspansel, hemelgewelf, firmament
Polish: firmament, sfera, sfera niebieska