Quote: The term Ephemeris derives from the Greek 'ephemeros', meaning daily.
It is used to refer to tables that give the positions of astronomical objects at given times. Strictly, an ephemeris gives positions in terms of the equatorial coordinates, right ascension and declination. However, given the landscape photographer's focus on the 'golden hours', figures are given here in terms of horizontal coordinates, most typically the azimuth at altitude zero, that is, the time of rising or setting.
Related: Stallarium, a FREE Open Source Planetarium
It is used to refer to tables that give the positions of astronomical objects at given times. Strictly, an ephemeris gives positions in terms of the equatorial coordinates, right ascension and declination. However, given the landscape photographer's focus on the 'golden hours', figures are given here in terms of horizontal coordinates, most typically the azimuth at altitude zero, that is, the time of rising or setting.
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Related: Stallarium, a FREE Open Source Planetarium
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