apex, apex of the sun's way, celestial point, nadir, solar apex, zenith, zodiac

ecliptic, celestial equator, zodiacal light, epsilon aurigae, capricornus, andromeda galaxy, galactic equator, heliopause, milky way galaxy, earthshine, syrtis major, photosphere, omega centauri, sidereal, asterism, oort cloud, ellipse, gibbous, jovian, corona borealis, prograde, eclipsing binary, nebulosity, triangulum, umbral, proxima centauri, 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, celestial, polarimetry, occultation, planetoid, celestial mechanics, tetrahedron, unpolarized, canis major, equinoxes, radial velocity, perigee, cosmos, gnomon, galaxy, retroreflector, exosphere, prime meridian, asteroidal, orbits, uranus, planetary, monoceros, lagrangian, photometry, mimas, eridanus, solstices, lutetia, synchronous orbit, magnetosphere, circumstellar, trifid, corot, ellipsoid, sunspot, mesosphere, auroral, cumulus cloud, constellations, betelgeuse, armillary sphere, doppler effect, circinus, corona australis, galactic, parabola, venusian, gravitational interaction, comet, zodiacal

sky

surface

empyrean, firmament, heavens, sphere, vault of heaven, welkin