1. Astronomical Ephemerides & Calculations
All high-precision solar, lunar, and planetary transit calculations, Delta-T time corrections, and celestial coordinate transformations are powered by Astronomy Engine.
Cross, D. (2024). Astronomy Engine: A C# / C++ / JavaScript / Python library for solar system ephemerides. MIT License.
2. NASA Five Millennium Catalog of Eclipses
Eclipse canonical predictions and century catalog benchmarks derived from the NASA Goddard Space Flight Center 5-Millennium Canon of Solar & Lunar Eclipses.
Espenak, F., & Meeus, J. (2009). Five Millennium Catalog of Solar Eclipses: -1999 to +3000 (2000 BCE to 3000 CE). NASA Goddard Space Flight Center, NASA TP-2009-214172.
3. Geographic Mapping & 3D WebGL Engines
2D interactive map tiles provided by CartoDB Positron Dark Basemap © OpenStreetMap contributors (ODbL / CC BY 3.0). Interactive 2D mapping engine by Leaflet.js (BSD-2-Clause). 3D Earth Globe rendered using Three.js WebGL (MIT License) with Natural Earth Data & TopoJSON world boundaries (Public Domain / D3.js).
4. Publisher & Educational Platform
Designed and developed for the Ethiopian Space Science Society (ESSS) Science Portal. Features pure mathematical Ethiopian Calendar (JDN 1723856 offset) integration and scientific Amharic localization.