Re: Can a sundial disprove Flat Earth?

No, that was not a proof of the globe; just a measurement of its size, assuming the globe. A small, close sun over a flat earth could give the same result for the two locations.However, several other observations had already proved the globe. And you could repeat the Eratosthenes experiment in

Re: Paper cubical sundial

Perhaps you are too close with the light. Ideally, the rays should be parallel, as if you were at infinity (or something like 150 million kilometers). I think the rays from the phone flashlight diverge too much, so that the shadows will, too. Op 9 maart 2016 om 15:00 schreef

Re: Diamond Fuji

These are gorgeous pictures. If rays from the sun are deflected downward by the mountain's knife edge, wouldn't their light appear to come from higher up in the sky, rather than from lower down? All a fine 2016, Rudolf52.5N 4.7E Op 6 januari 2016 om 13:21 schreef Frank King

Re: due east

Due east is a right angle from north-south. But the 'line' of latitude is not a great circle (except the equator, which is). So if you keep walking due east, you are really always curving towards the pole.Suppose you lived 1 meter from the North Pole; then you would walk along a circle of 2

Re: due east

Due east is a right angle from north-south.  Op 15 september 2015 om 16:10 schreef Brent : I'm confused maybe. I live in the northern hemishpere and anticipating the equinox on the 23rd. Supposedly the sun will rise due east. So if due east is a right

RE: R: RE: Flow of medieval glass

Well, well, what a lengthy discussion! I would guess that window sundials will not go wrong because of glass movement. That said, it seems totally plausible that glass cuts will fill up on a very small scale. It reminds me of a steel spring, that will return to its shape within parts of a

RE: DST Misconceptions

I had to laugh out loud when I saw your magnificent design. Thank you so much. Van: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] Namens Fabio Savian Onderwerp: Re: DST Misconceptions ...last year I solved the problem of DST at my home; now I've Delight Sleeping

RE: HSW translations.

Dear Tony, Thank you for your HSW presentation! I wonder if it would not be a good idea to have a Dutch translation, too. Even if many Dutch read English fairly well, it would be a shame to find that one or two details would get underexposed because of some malevolent instance of linguistic faux