# Planetary models

## Almagest models

The implementation is partially based on
prof. van Gent's
Almagest Ephemeris Calculator
and
prof. Duke's
Almagest Planetary Model Animations.

- Sun
- Ptolemy's solar model, where the apsidal line is tropically fixed.
- Sun
- A modified solar model as in Alfonsine Tables, where the apsidal line is sidereally fixed.
- Moon
- One of the two most complicated models of Ptolemy.
- Mercury
- One of the two most complicated models of Ptolemy.
- Venus
- Ptolemy's model for Venus.
- Mars
- Ptolemy's model for Mars.
- Jupiter
- Ptolemy's model for Jupiter.
- Saturn
- Ptolemy's model for Saturn.