Some new items (all in already built sundials):
- The seasonal or temporary hours - The canonical time - The sideral time - The instant when a given star or constellation transits - The planetary hours - The beginning of the Zodiacal signs - The day of an important date (f.e. birthday, wedding anniversary, etc.) - The time in different cities in the world - The school timetable - The hours of light, that is to the Civil Twilight - The hours to the Astronomical Twilight - The time of the Islamic Prayer Zuhr (noon prayer) - The time of the Islamic Prayer ‘Asr (afternoon prayer) - The time of the Islamic Prayer Maghrib (sunset prayer) - The time of the Islamic Prayer Isha’ (night prayer, at the end of the astronomical twilight) - The direction of Mecca, that is the Islamic kibla Best wishes Gianni Ferrari 2010/11/16 Jos Kint <[email protected]> > Dear sun dialists, > > What can be calculated with a good sun dial? Here is a list of 19 topics. > Can you add some more items? > 1. The hour of the day > 2. The day of the year. > 3. The solar altitude. > 4. The solar azimuth. > 5. The longitude of the sun dial. > 6. The latitude of the sun dial. > 7. The moment of the equinoxes > 8. The moment of the solstices. > 9. The length of the tropical year > 10. The equation of time > 11. The excentricity of the earth orbital around the sun. > 12. The obliquity of the eclips > 13. A compass function > 14. The declination of the sun. > 15. The moment of the perihelion > 16. The moment of the aphelion > 17. The moment of the next sun set > 18. The Babylonic time > 19. The Italian time > > > Jos Kint > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > -- --------------------- Ing. Gianni Ferrari Via Valdrighi 135 - 41124 Modena 059 367989 - 349 3581301 Lat. 44;38,18.5N Long. 10;56,05.3E [email protected]
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