# The Astrocalculator

The &kstars; Astrocalculator provides several modules that give you direct access to algorithms used by the program. The modules are organized by subject:

## Coordinate Converters

- Apparent coordinates

- Equatorial/Galactic coordinates

- Horizontal coordinates

- Precession

## Earth Coordinates

- Geodetic Coordinates

## Time Calculators

- Day Duration

- Julian Day

- Sidereal Time

&calc-apcoords; &calc-eqgal; &calc-horiz; &calc-precess; &calc-geodetic; &calc-dayduration; &calc-julian; &calc-sidereal;