Celestial sphere keywords (i.e., Celestial sphere keywords): altitude, axial precession (AKA precession of the equinoxes), azimuth, cardinal directions NSEW (north south, east, west), astronomical cardinal directions NSEW, celestial axis, celestial coordinate systems, celestial equator, celestial globe, celestial meridian (AKA the meridian), celestial sphere, constellations (see also IAU-defined 88 constellations), culmination (AKA transiting the meridian) (upper culmination, lower culmination), day (afternoon, dusk, evening, midnight, morning, night, noon, solar noon, sunrise, sunset, twilight (AKA gloaming)), declination (Dec), Earth, Earth's axis, ecliptic, ecliptic axis (AKA ecliptic pole) ecliptic plane, ephemerides, equatorial coordinate system (equatorial coordinates: right ascension (RA), declination (Dec or δ)), equinox (vernal equinox (c.Mar21), fall equinox (c.Sep21)), geographic coordinate system (geographic coordinate: latitude, longitude), ground, horizon, horizontal coordinates (AKA local coordinates), irradiance, intensity, IAU-defined 88 constellations, intensity latitude, light rays, longitude, midnight, nadir, north celestial pole (NCP), noon, orrery, right ascension (RA), season (spring, summer, fall, winter), seasonal lag, solar energy, solar irradiance, solar power, solstice (summer solstice, winter solstice), south celestial pole (SCP), subsolar point, Sun, sunlight, TheSky, transit, transiting the meridian (AKA culmination), vernal equinox (0 h RA) (AKA First Point of Aries), zenith, zodiac (see Wikipedia: Zodiac: Table of Dates), zodiac constellations, zodiac signs. etc.
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File: Celestial sphere file: celestial_sphere_keywords.html.