NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Speed of Sunset
From: UNK
Date: 2016 Oct 1, 21:34 -0700
From: UNK
Date: 2016 Oct 1, 21:34 -0700
Hi Geoffrey,
You asked:
>> In what sense do you mean that astrologers use EoT? Mean solar time is used for the timing of the chart, and the ephemerides used by astrologers use mean solar time for the positions of the planets..... (A chart set for noon, for example, will usually not have the sun on the midheaven) <<
Everything you are saying is correct, but for that very reason astrologers had to convert LAT into mean time as long as people used it in their daily lifes for recording births, and so on (and the almanacs too). Nowadays, the EoT is only used for historical work. (Say, for instance, to re-work a historical horoskope. A notorious example is that for Wallenstein by Kepler, where the LAT - LMT conversion apparently was (is?) a source of confusion.)
I would guess that this is quite similar to the situation within the navigation community?
Herbert
