Lunar analemma?

2004-08-07 Thread Anselmo Perez Serrada
picture...? It doesn't seem so difficult: just 28 pictures, one every 24h51m28s, preferably in winter months (winter because night time is longer and because the full moon culminates higher at noon). Best regards Anselmo Perez Serrada www.relojesdesol.org -

Re: Turtle Bay Sundial Bridge opens

2004-07-05 Thread Anselmo Perez Serrada
The "dial" is included in the NASS Register of North American sundials. California / Redding / #518 http://sundials.org/registry/ Bob I see, therefore I believe. Show me the hour lines and how they coped the 'small problem' that the gnomon does not point at the NCP and I'll believe it is

A new GnomoniCalculator

2004-06-11 Thread Anselmo Perez Serrada
Last week I came across a nice web on gnomonics that distributes (completely free!) a nice Gnomonical Calculator, called SOLARIUM and written by P.J. Dallet.. Perhaps the calculator is not for beginners and some parts are still French-only, but anyway the whole web is worthwhile having a glance

More on Venus Transit

2004-05-11 Thread Anselmo Perez Serrada
This question goes to the shadow-sharpeners experts: Which is better (or worst) to observe the transit of Venus, a shadow-sharpener or a welding glass? Or both are more or less equally bad? Regards, Anselmo -