clouds, sky, blue sky, celestial equator, capricornus, cusp, loom, rearview, thunderhead, future, dawning, harbinger, brighter, rearview mirror, mirage, celestial sphere, landscape, alpenglow, portent, galactic equator, prospects, cumulus cloud, altocumulus, offing, silver lining, nebulosity, expanse, stargaze, materializing, celestial pole, glide path, planitia, shadow, cloudscape, promontories, pall, precipice, sights, firmament, glary, sunbeams, gaze, eyes, corona borealis, andromeda galaxy, moonless, airglow, heliopause, cloudy, constellation, ecliptic, southeastwards, twilight, epsilon aurigae, presage, stratus, auguries, aurorae, mistiness, glimmer, yonder, radar, equator, skyline, scope, shores, eridanus, skyscape, potential, imminence, thunderclouds, hyades, sunsets, syrtis major, gleam, glints, treeline, implications, heavens, canis minor, certainties, flickers, southwestward, asterism, downside, haloes, zodiacal light, foreshadowing, puppis, possibilities, moonlike, stormier, outward, verge, impends, sunnier, canis major, afterglow, heavenwards, omega centauri, eastwards, subaquatic, horizons, reach, reaches, predominate, universe, field, sphere, watershed, aisle, ambit, focus, outlook, perspective, span, area, borders, nile, anti, asa, chorus, frailest, grace, guide, italic, ithyphallic, ok, poverty, scribe, winch, -1, -2, 0, 0-10, 01, 1

geological horizon, soil horizon

., alt, altitude, angle of dip, angry, artificial horizon, ascension, attitude, b-horizon, broaden, b horizon, c-horizon, celestial horizon, circumpolar, cloud, culmination, c horizon, depression, dip, el, elevation, erectness, fixate, flight indicator, go down, go under, gyro horizon, heat lightning, horizontal, horizontality, horizontal parallax, inclination, inclinometer, low-lying, magnetic dip, magnetic inclination, mother-of-pearl cloud, nacreous cloud, out of sight, parhelic circle, parhelic ring, perceive, perpendicular, perpendicularity, risen, rising, set, setp, setting, solar halo, sundown, sunrise, sunset, supersonic, tower, twilight, under, uprightness, vanishing point, vertical, verticality, verticalness, vertical circle

linear perspective, perspective, profile

ambit, compass, great circle, line, orbit, range, reach, scope, stratum

apparent horizon, celestial horizon, purview, sensible horizon, skyline, view, visible horizon