<sect1 id="tool-calculator"> <title >The Astrocalculator</title> <indexterm ><primary >Tools</primary> <secondary >Astrocalculator</secondary> </indexterm> <para >The &kstars; Astrocalculator provides several modules that give you direct access to algorithms used by the program. The modules are organised by subject: <itemizedlist ><title >Coordinate Converters</title> <listitem ><para ><link linkend="calc-angdist" >Angular Distance</link ></para ></listitem> <listitem ><para ><link linkend="calc-apcoords" >Apparent Coordinates</link ></para ></listitem> <listitem ><para ><link linkend="calc-ecliptic" >Ecliptic Coordinates</link ></para ></listitem> <listitem ><para ><link linkend="calc-eqgal" >Equatorial/Galactic Coordinates</link ></para ></listitem> <listitem ><para ><link linkend="calc-horiz" >Horizontal Coordinates</link ></para ></listitem> <listitem ><para ><link linkend="calc-precess" >Precession</link ></para ></listitem> </itemizedlist> <itemizedlist ><title >Earth Coordinates</title> <listitem ><para ><link linkend="calc-geodetic" >Geodetic Coordinates</link ></para ></listitem> </itemizedlist> <itemizedlist ><title >Solar System</title> <listitem ><para ><link linkend="calc-planetcoords" >Planets Coordinates</link ></para ></listitem> </itemizedlist> <itemizedlist ><title >Time Calculators</title> <listitem ><para ><link linkend="calc-dayduration" >Day Duration</link ></para ></listitem> <listitem ><para ><link linkend="calc-equinox" >Equinoxes and Solstices</link ></para ></listitem> <listitem ><para ><link linkend="calc-julian" >Julian Day</link ></para ></listitem> <listitem ><para ><link linkend="calc-sidereal" >Sidereal Time</link ></para ></listitem> </itemizedlist> </para> &calc-angdist; &calc-apcoords; &calc-ecliptic; &calc-eqgal; &calc-horiz; &calc-precess; &calc-geodetic; &calc-planetcoords; &calc-dayduration; &calc-equinox; &calc-julian; &calc-sidereal; </sect1>