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• Sunrise equation — The sunrise equation as follows can be used to derive the time of sunrise and sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually occur::cos(ωo) = tan(φ)×tan(δ)where ωo is the hour angle in… …   Wikipedia

• Solar azimuth angle — The solar azimuth angle is the azimuth angle of the sun. It is most often defined as the angle between the line from the observer to the sun projected on the ground and the line from the observer due south. A positive azimuth angle generally… …   Wikipedia

• Solar elevation angle — The solar elevation angle is the elevation angle of the sun. That is, the angle between the directionof the sun and the (idealized) horizon. It can be calculated, to a good approximation, using thefollowing formula::, sin heta mathrm{s} = cos h… …   Wikipedia

• Golden hour (photography) — This article is about a special day time in photography. For the concept of urgent assistance, see Golden hour (medicine). Bangkok during the golden hour In photography, the golden hour (sometimes known as magic hour, especially in… …   Wikipedia

• Equinox — This article is about the astronomical event when the sun is at zenith over the Equator. For other uses, see Equinox (disambiguation). For the same event happening on other planets and setting up a celestial coordinate system, see Equinox… …   Wikipedia

• Noon — For other uses, see Noon (disambiguation). Midday redirects here. For other uses, see Midday (disambiguation). Noon time redirects here. For the song by Zion I, see Heroes in the City of Dope. Noon (also mid day or noon time) is usually defined… …   Wikipedia

• Day length — as a function of latitude and the day of the year Day length, or length of day, or length of daytime, refers to the time each day from the moment the upper limb of the sun s disk appears above the horizon during sunrise to the moment when the… …   Wikipedia

• Declination — For other uses, see Declination (disambiguation). In astronomy, declination (abbrev. dec or δ) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is… …   Wikipedia

• Conjunction (astronomy and astrology) — Conjunction of Mercury and Venus, align above the Moon, at the Paranal Observatory. Conjunction is a term used in positional astronomy and astrology. It means that, as seen from some place (usually the Earth), two celestial bodies appear near one …   Wikipedia

• Solar time — On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant …   Wikipedia

• Solstice — For other uses, see Solstice (disambiguation). UTC date and time of solstices and equinoxes[1] year Equinox Mar Solstice June Equinox Sept Solstice Dec day time day time day time day time 2004 20 …   Wikipedia