equinoxes, equinox, spring equinox, vernal equinox, autumnal equinox, summer solstice, winter solstice, celestial equator, ecliptic, tishri, sidereal, lunar calendar, lunisolar calendar, galactic equator, constellations, perihelion, asterism, sundials, vernal, earthshine, candlemas day, celestial sphere, gregorian calendar, paschal, occultation, aphelion, samhain, sextile, moonrise, candlemas, baisakh, periodicities, ptolemaic, zodiac, celestial, sunspots, phalguna, rosh chodesh, celestial mechanics, zodiacal light, mithraic, ancients, kislev, saturnian, pleiades, perseids, holocene epoch, gnomon, climatological, zoroastrianism, moons, parashah, moharram, precession, babylonians, sabbaths, triduum, el nino southern oscillation, uranian, cheshvan, jainism, obliquity, capricornus, pagan, perigee, epochs, lunar, conjunctions, mesoamerican, eratosthenes, ophiuchus, phenology, longitudes, photosphere, shavuot, theophany, hilal, gautama buddha, yahrzeit, equator, henge, pliocene epoch, lupercalia, hipparchus, lunar eclipse, canis major, beltane, toltecs, druidism, shevat, triangulum, cosmogony, omer, geoid, uranus, syrtis major, periodicity, meteor shower, moonset, algol, prograde, ellipse, maxima, solstice, elongations, midpoints, minima, monsoons, normals, abundances, altitudes, angles, antipodes, apex, archbishops, averages, azimuth, azimuths, birthdays, bishops

season, time of year