Calculates dates & times for equinoxes, etc.

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Calculates dates and times for equinoxes, solstices and cross-quarter days.

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Calculates dates & times for equinoxes, etc.
Equinoxes, Solstices and Cross-Quarter Days 5.22 by Hermetic Systems
License: Free To Try
Popularity:
93.8% popularity: Equinoxes, Solstices and Cross-Quarter Days
Equinoxes, Solstices and Cross-Quarter Days scanned and found to be virus free

Publisher's description

This software calculates accurate dates and times for equinoxes, solstices and the Celtic cross-quarter days (Imbolc, Beltane, Lughnassad and Samhain). The cross-quarter days are those midway between the equinoxes and solstices. For example, Imbolc is midway between the northern winter solstice and the northern spring equinox (a.k.a. the northern vernal equinox), and Beltane is midway between the northern spring equinox and the northern summer solstice. When we attempt to define the cross-quarter days more exactly we find that there are two interpretations, and thus two methods of calculation, which give slightly different results. These two methods are called the 'mean sun' method and the 'true sun' method. The mean sun method assumes (erroneously) that the Earth moves at a constant speed in a circular orbit around the Sun. The true sun method calculates a cross-quarter day based on the time at which the Earth reaches that point in its orbit which is spatially (geometrically) exactly halfway between its positions at the solstice (or equinox) and the subsequent equinox (or solstice).




Size: 1.4MB
Cost: $14.95


Rate this program:
4.6666666666667 Out of 5
Rated by 3 users.
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Astronomy category

What's New in this Release: Relaxed trial version restriction
Platform: Win XP,Win 98,Win 2000,WinVista x32,WinVista x64,Win7 x32,Win7 x64,Win8 x32,Win8
License: Free To Try
Category: Home & Hobby::Astronomy
Date Added: Apr 28, 2009
Last check for an update: Dec 07, 2016
Last version date: Dec 25, 2015
Downloads Total : 4
Downloads last 10 Days: None
Page Visit: 191
Malware Status: Clean
Scan Date: Apr 30, 2009

Link to Equinoxes, Solstices and Cross-Quarter Days sample code
Calculates dates and times for equinoxes, solstices and cross-quarter days.



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