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23 lines
1.3 KiB
23 lines
1.3 KiB
<sect2 id="calc-equinox">
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<title>Equinoxes and Solstices module</title>
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<indexterm><primary>Tools</primary>
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<secondary>Astrocalculator</secondary>
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<tertiary>Equinoxes and Solstices module</tertiary>
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</indexterm>
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<screenshot>
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<screeninfo>The Equinoxes and Solstices calculator module </screeninfo>
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<mediaobject>
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<imageobject>
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<imagedata fileref="calc-equinox.png" format="PNG"/>
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</imageobject>
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<textobject>
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<phrase>Equinoxes and Solstices</phrase>
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</textobject>
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</mediaobject>
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</screenshot>
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<para>The <link linkend="ai-equinox">Equinoxes</link> and Solstices module calculates the date and time of an equinox or solstice for a given year. You specify which event (Spring Equinox, Summer Solstice, Autumn Equinox or Winter Solstice) should be investigated, and the year. Then press the <guibutton>Compute</guibutton> button to obtain the date and time of the event, and the length of the corresponding season, in days. </para>
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<para>There is a batch mode for this module. To use it, simply generate an input file whose lines each contain a year for which the Equinox and Solstice data will be computed. Then specify the input and output filenames, and press the <guibutton>Run</guibutton> button to generate the output file. Each line in the output file contains the input year, the date and time of each event, and the length of each season. </para>
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</sect2>
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