# The Astrocalculator

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

## Coordinate Converters

- Angular Distance

- Apparent Coordinates

- Ecliptic Coordinates

- Equatorial/Galactic Coordinates

- Horizontal Coordinates

- Precession

## Earth Coordinates

- Geodetic Coordinates

## Solar System

- Planets Coordinates

## Time Calculators

- Day Duration

- Equinoxes and Solstices

- Julian Day

- Sidereal Time

&calc-angdist; &calc-apcoords; &calc-ecliptic; &calc-eqgal; &calc-horiz; &calc-precess; &calc-geodetic; &calc-planetcoords; &calc-dayduration; &calc-equinox; &calc-julian; &calc-sidereal;