Hi Maciej,
Thanks for your recent post. Since no one seems to have replied to your
plea in the final paragraph for software to draw a
stereographic/Oughtred dial, here are some existing open software options:
* Gian Casalegna's _Orologi Solari_ will draw one: azimuth:
horizontal/vertical: as
# 5, in my most recent post, should say:
.
To determine the hour-angle of the mean-Sun:
.
1. Convert the minutes in the LMT to a fraction of an hour.
.
2. Subtract 12 hours from the LMT, or add 12 hours to the LMT…whichever
gives a number between 0 & 24.
.
3. Multiply the result by 15.
---
(I’d post this as a “reply” to my existing topic, but that thread doesn’t
show up in my display, & so it’s necessary to post this as a new topic.)
.
Yesterday I described a way of estimating EqT, which depended on the fact
that the EqT is zero on some known day. But EqT can be also estimated
wit
Is this real or a concept? The shadows don’t move in the rest of the image.
- Bill
On Sun, Oct 30, 2022 at 7:14 AM Alexei Pace wrote:
> Interesting one in Rue Montmartre
> https://www.instagram.com/reel/Cj0hS2JIPQV/?igshid=YmMyMTA2M2Y=
>
> On Wed, Oct 26, 2022, 11:58 Werner Riegler wrote:
>
>>
Interesting one in Rue Montmartre
https://www.instagram.com/reel/Cj0hS2JIPQV/?igshid=YmMyMTA2M2Y=
On Wed, Oct 26, 2022, 11:58 Werner Riegler wrote:
> Dear John,
>
> I know this object as “Horizontoscope".
> http://www.horizontoscop.com/eng/index_eng.html
>
> I bought one recently after reading a
