This part of the site contains useful documents.
The "library" is a repository of various useful documents for ephemeris calculation and representation.
To be complete, it should present notions of mathematics, celestial mechanics.


  • Math tips - Ephemeris calculation is based on sometimes complex calculations. But the development and understanding of JEphem only require quite simple notions, which are exposed here.

  • Symbols - Symbols used in texts or figures of the site, like Greek letters, symbols of the planets.

  • Links - Links to other sites related to ephemeris calculation.