celestial sphere Definition

heavens, empyrean, sphere, firmament, welkin, vault of heaven, celestial equator, ecliptic, zodiacal light, oort cloud, andromeda galaxy, planetary, sidereal, proxima centauri, uranus, celestial, corona borealis, sunspot, galactic, epsilon aurigae, capricornus, galactic equator, heliopause, milky way galaxy, earthshine, syrtis major, photosphere, omega centauri, asterism, ellipse, gibbous, jovian, prograde, eclipsing binary, nebulosity, triangulum, umbral, arcsecond, aphelion, isosceles triangle, chromosphere, equilateral triangle, heliosphere, perihelion, occulted, moonlet, sundog, saturnian, cepheus, airglow, uranian, sunward, extragalactic, horsehead nebula, tarantula nebula, periodicities, astrometry, nebular, spiral galaxy, protostar, planets, obscuration, puppis, polarimetry, occultation, planetoid, celestial mechanics, tetrahedron, unpolarized, canis major, equinoxes, radial velocity, perigee, cosmos, gnomon, galaxy, retroreflector, exosphere, prime meridian, asteroidal, orbits, monoceros, lagrangian, photometry, mimas, eridanus, solstices, lutetia, synchronous orbit, magnetosphere, circumstellar, trifid, corot, ellipsoid, mesosphere, auroral, cumulus cloud, constellations, betelgeuse, armillary sphere,