 |
 |
 |
|
Calculates dates and times for equinoxes, solstices and cross-quarter days.
|
|
 |
|
 |
|
|
|
|
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).
|
|
|
Buy ($14.25) / Download (1.4 MB)
|
beltane, imbolc, lughnassad, samhain, solstice, equinox, cross, cross-quarter, day, time, sun, date, calculation, earth, mean sun, true sun, orbit, perihelion, vernal, winter, calendar, summer, year, autumn
|
| Download |
Avg. User Rating |
Overall |
|
-
|
-
|
-
|
| 26 / 3 (total / last month) |
| 10-02-2009 |
| English |
| Win98, WinME, WinNT 4.x, Windows2000, WinXP, Windows2003, Windows Vista Starter, Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Business, Windows Vista Enterprise, Windows Vista Ultimate |
| Screen resolution of at least 1024x768. |
| Install and Uninstall |
|
|
Recent reviews: |
|
| JPEG Lossless Rotator 6.5 |
Rating:  |
| This thing is completely useless. Even Microsoft Paint can rotate image by 90 degree increments, which is all this does! |
| Typer Shark Deluxe 1 |
Rating:  |
| I Like it a lot... I want to play. Good and Its an excellent travel tool, which provide even sharability of the choosen deals with your loved ones. |
| Forex Strategy Builder 2.5.3.0 |
Rating:  |
| It's useful! FSB tests a strategy very fast, includes an automatic strategy generator.
It uses different method of bar interpolation and that make... |
|
|
