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+<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 organized 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>
+