Here is a list of all documented modules with brief descriptions:

Mthesky_asteroids	Procedures for asteroids
Mthesky_bscdata	Data from the Bright Star Catalogue (BSC)
Mthesky_cometdata	Data to compute comet positions
Mthesky_comets	Procedures for comets
Mthesky_constants	Constants used in libTheSky
Mthesky_coordinates	Procedures for coordinates
Mthesky_data	Procedures to set constants and read data files
Mthesky_datetime	Date and time procedures
Mthesky_daylight	Daylight procedures
Mthesky_functions	Assorted procedures
Mthesky_local	Local parameters for libTheSky: location, date, time
Mthesky_moon	Procedures for the Moon
Mthesky_moondata	ELP 2000-82B Moon data, needed to compute Moon positions
Mthesky_moonroutines	Procedures for the Moon
Mthesky_nutation	Procedures for nutation
Mthesky_planetdata	Planet data, needed to compute planet positions
Mthesky_planets	Procedures for planets
Mthesky_riset	Procedures to determine rise, transit and set times
Mthesky_stardata	Star and basic constellation data
Mthesky_stars	Procedures for stars
Mthesky_sun	Low-accuracy procedures for the Sun
Mthesky_version	Report libTheSky version number
Mthesky_visibility	Procedures to determine the visibility of objects
Mthesky_vsop	Procedures for VSOP