BSS Sundial Zoom Event - 16:00 UTC, 17 April

Dear All, The British Sundial Society is hosting a Zoom event this coming Saturday 17 April at 16:00 UTC. [Note 16:00 UTC = 17:00 BST/IST = 18:00 CEST and = 09:00 PDT = 12:00 EDT etc!] The outline programme is: Frank King: Welcome and Introduction Roger Bailey: French Alpine Sundials

Re: How to turn ecliptic longitude into solar declination?

Dear Steve, Michael, Werner and Fabio have provided some excellent responses to your question. If you are ONLY interested in relating three ANGLES - solar longitude, solar declination and the obliquity - then this relationship is indeed all you need: sin(lambda).sin(obliquity) =

Re: Republican Calendar, Year 231

Dear Michael, I am most grateful to you for pointing out an error in my message. I referred to: > ... your hero Pope Gregory III and you correctly commented: > I doubt that he called himself Gregory... Quite so, BUT you missed a MUCH more serious error. He was neither Gregory III nor

Re: Republican Calendar, Year 231

out. As others have said: this calendar is GREAT FUN. Have a good year! Frank Frank King Cambridge, U.K. --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Happy New Year

in the engraving alluding to casting off the old ways and introducing new ways. It is worth reading all the writing which is in very simple French! Enjoy your day. Enjoy Year 231. Frank Frank King Cambridge, U.K. Full instructions for examining the Calendar: Visit: https://en.wikipedia.org

Re: Computing hour lines for horizontal sundials

Dear Steve, R. Hooijenga is right. Adding 10 was a common way to proceed. We are talking about log-to-base-10 which I imagine is rarely used these days but when it was in common use there were all kinds of tricks. I suspect these were different in North America from in Europe Consider the logs

Zoom Sundial Event - Today 17:00 UTC

Dear All, Later today, with Martins Gills, I am hosting a Sundial Zoom Event. Here is the Zoom link: Invitation... Frank King - BSS is inviting you to a scheduled Zoom meeting. Topic: BSS December 2023 Bulletin Follow-up Time: Jan 24, 2024 17:00 London Join Zoom Meeting https

Octahedral Sundials

Dear All, I am trying to find examples of sundials that have been set out on some or all the faces of a REGULAR OCTAHEDRON. There are many examples of Dodecahedra and Icosahedra but I can't find ANY Octahedra. If you know of any, please share the knowledge!! Very best wishes Frank Frank King

Zoom Sundial Event - Tomorrow 16:00 UTC (17:00 UTC)

Dear All, Tomorrow, Friday 26 April at 16:00 UTC (17:00 BST), Frank King and Martins Gills are hosting a Sundial Zoom Event. Here is the formal invitation: Invitation..., Frank King – BSS is inviting you to a scheduled Zoom meeting. Topic: BSS March 2024 Bulletin Follow-up Time: Apr 26, 2024

Photograph of the Princess of Wales

n the same direcion as the light. I'll leave that as an exercise for the reader :-) Frank King Cambridge, UK --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Zoom Sundial Event – Wednesday 24 July 16:00 UTC (17:00 UTC)

Dear All, On Wednesday 24 July at 16:00 UTC (17:00 BST), Frank King and Martins Gills will be hosting a Sundial Zoom Event. Here is the formal invitation: Frank King - BSS is inviting you to a scheduled Zoom meeting. Topic: BSS June 2024 Bulletin Follow-up Time: Jul 24, 2024 17:00

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