To Do

Eventually these items will make there way to the issues section of http://bitbucket.org/timcera/astronomia:

Improve the lunar model, perhaps with the complete
Chapront ELP2000-82.

Add more material from Meeus:

  Add a model for Pluto.

  Add year-by-year polynomial model for planets Jupiter
  through Neptune.

  Add perihelion/aphelion routines for the planets, and
  perigee/apogee routines for the Moon.

  Look at adjustable truncation of the VSOP model to
  trade accuracy for time.

Fix a bug in the Rise-Set-Transit code which causes events
around 0hr UT to be dropped.

Fix a bug in cronus.py that causes equinox/solstice events
to be reported out of order on that day. (The displayed
values are correct, though).

Improve the param file parsing so people can enter their
longitude and latitude more naturally.