The term “Visual Ephemeris” (or “Graphical Ephemeris”) bridges the gap between raw data and imagery. Historically, an ephemeris was simply a dense book or table listing the coordinates, trajectories, and changing positions of celestial bodies over time. By making it “visual,” software developers and authors convert these numbers into maps, 3D spheres, or charts.
The concept is used across two main fields: photography/astrophotography and astrology. 1. Landscape Photography & Astrophotography
In photography, a visual ephemeris serves as an interactive planner to track light, sun paths, and stars. Instead of calculating coordinate grids, users pin a location on a map to see how light behaves in real time. TPE Web App The Photographer’s Ephemeris
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