eclipse?Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org
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l surviving Sanskrit astrolabes and sundials using ghatis and they look very similar to Persian astrolabes except for the time scale. There are many detailed differences also.Best regards,Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org On 11/30/14, Darek
n the results as I have only one sample giving confirmed values. I am hoping someone in the sundial brain trust can direct me to an available trusted source of Polaris coordinates for years in the past. A few accurate values that I can try to replicate would also be useful.Best regards,Jim James E. Mor
Link provided by Tony Moss:https://www.youtube.com/embed/Pwe-pA6TaZk?rel=0 James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org
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ations if there is an interest/need.Best regards,Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org
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The transit went almost perfectly in southern Delaware. After a day of scattered clouds to clouldy to broken clouds, the sky opened up crystal clear at the right time: 6:04 PM and it stayed clear until sunset. We had two sites: one at the entrance to Lewes, DE on Delaware Bay and another on the e
st regards, Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org
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nstructing the real route one point at a time. A protractor that can be moved around the screen, positioned and rotated would be ideal. I think I have seen such a tool, but can't find it now. I hope this is relevant to the group. Best regards, Jim James E. Morrison janus.astrol...@verizon.ne
As I recall, about a year ago someone posted a Google Earth add-on to make it easy to measure the declination angle of walls or buildings with Google Earth. I don't even remember what it was called. I would appreciate it if someone could point me to it. Thanks, Jim James E. Mor
014 is the distance to the sun on that date in AU's. The other values are coefficients of a spline curve that fits the data. Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.orgFrom: Dwayne Henderson Date: Oct 18, 2011 7:50:20 AM Subject: Appr
re not and are, as far as I can tell, the norm for this sort of thing. Thanks, Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.org
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result. Best regards, Jim James E. Morrison janus.astrol...@verizon.net Astrolabe web site at http://astrolabes.orgFrom: axel törnvall gonzalez Date: Sep 22, 2011 8:58:05 PM Subject: Where it wil be equinox, at noon To: This is my Subject; Finding the position, Longitud, where, the sprig
' (mostly in Dutch): http://www.wijzerweb.be
Op 22-mrt-2011, om 01:02 heeft Jan Bielawski het volgende geschreven:
Is the Prague clock of the same design as the one in Bern? See e.g.http://starswebworx.lc-stars.com/swiss_photo/Bern.htm (scroll down abit).--JanOn Mon, Feb 28, 2011 at 09:15, Jam
Perhaps some background would be useful to those on the list who are not familiar with astrolabes and astrolabe clocks.
The Prague clock is based on an astrolabe with the projection origin at the north celestial pole. This orientation causes the horizon arc to arc in the reverse direction from
Perhaps a bit off topic, but I notice the previous article of the month from the Dutch Sundial Society was Gunter's quadrant. For anyone interested, you can download the chapter on Gunter's quadrant from my astrolabe book at:
http://astrolabes.org/pages/theastrolabe.htm
It has the details of
Frank,
It would take some effort to make a conclusive argument as to the projection used on Brazil's flag, but the description on Widipedia says it is an orthographic projection (the projection origin is at infinity). The date and time when Crux (the Southern Cross) was on the meridian are cor
It seems to me you could consider the Capuchin dial variations, including the Navicula Venetiis, as altitude dials with a moving element. It's not a gnomon in the classic sense, but you do set the suspension point for the thread to the date.
Jim
James E. Morrisonjanus.astrol...@verizon.netAstr
Dipping my oar in the water, Delta-T is absolutely required for accurate calculations. Almost all of the published polynomials for calculating orbital values are in the form of a polynomical based on the fraction of a Julian century for the epoch. This variable, T, is calculated from the Julian d
In the Dec. 18, edition of the Austin (Texas) Statesman, columnist Mark Lisheron comments on a ban on the use of navigation devices while driving. I am making some broad inferences, but I think what he saying is that a ban on using GPS devices will only cause people to drive with sextants and astr
Actually, Paul de Kort may not be wrong at all, depending somewhat on your point-of-view. There are actually three definitions of the zodiac:1. The zodiac definition that is most familiar to us is the "tropical zodiac", which ties Aries 0 deg to the vernal equinox and divides the tropical year int
I can't resist dipping my toe in the water to observe that many of the functions of an astrolabe work just as well indoors, where it is warm, dry and comfortable, as they do outdoors, where it may be cold, windy, wet and dark. Opps. Sundials don't work in the dark either. I hope this doesn't gen
Our experience on this subject has been the reverse. That is, after renovating a park, there were fewer "undesireable" elements than before the renovation, possibly for two reasons: increased police patrols at first and higher use by the general public.The project in this case was the renovation o
Each year, the Astronomical Almanac publishes polynomials for calculating the mean solar orbital elements (mean longitude, mean anomaly, etc.) as a polynomial with the day-of-year as the index. The formulas are valid only for a given year.Does anyone know of a place on-line to get the polynomials
My father was born in the Oklahoma Territory in 1907 which became the state of Oklahoma soon after. He and I built a simple vertical dial for his house in the 70's and some of the material we used was from an assignment he had had in school. As I recall, it was mainly graphical, but had some math
Some time ago, not long after Vista made its presence known in several bizarre ways, I tested The Electric Astrolabe with DOSBox. I noticed it was gradually losing time compared to the system clock, starting at just a few seconds but losing a little time continuously. It just gets worse the longe
I don't think anyone mentioned that yesterday was square root day:
3/3/09 (or 3.3.09 for our international friends). It only happens nine
times a century and the next one is 4/4/16.
Jim
James E. Morrison
janus.astrol...@verizon.net
Astrolabe web site at http://astrolabe
ed in this project understands that some technical
compromises were required to move it from the realm of machine to art. It
really is pretty. Particularly at night.
Best regards,
Jim
James E. Morrison
[EMAIL PROTECTED]
Astrolabe web site at http://astrolabes.org
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there has
been activity and my ISP is blocking the notes.
Best regards,
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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he south side of the disk.
Chris Lusby Taylor
- Original Message -
From: "Chris Lusby Taylor" <[EMAIL PROTECTED]>
To: "James E. Morrison" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Wednesday, April 30, 2008 2:03 PM
Subject: Re: Anaphoric Star
made.
It is described at:
astrolabes.org/anaphoric.htm
Best regards,
Jim
James E. Morrison
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The anaphoric star disk is described at:
astrolabes.org/anaphoric.htm
Sorry.
Jim
James E. Morrison
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made.
It is described at:
astrolabe.org/anaphoric.htm
Best regards,
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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detailed description of the Prague gearing, and the
trains for many other astronomical machines.
Best regards,
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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ickard
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James E. Morrison
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James E. Morrison
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It was painful to fill in, "SUNDIALS".
The Times has spoken, so it's time to order new stationery for the NAQGFS.
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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rolabe.htm.
Best regards,
Jim
James E. Morrison
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ansas City is a city that evolved and streets are pretty much
where they ended up, without much in the way of long term planning.
We haven't tried to get access to the tops of the buildings. I hadn't thought
of doing that. We can't use Polaris from the park. A building is in the
the meridian
when you are in a big hole?
Happy New Year,
Jim
James E. Morrison
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between
now and 3100 BC.
Merry Christmas,
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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working on a Windows version of The Electric Astrolabe. Don't hold
your breath. It's hard when you're old and fat and lazy and stupid.
Best regards,
Jim
P.S. My book on astrolabes is out. See astrolabes.org/theastrolabe.htm.
James E. Mor
he subject line.
The translators are to be congratulated for making this reference available.
Best regards,
Jim
James E. Morrison
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Astrolabe web site at astrolabes.org
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ghly subjective and depends on local air quality, cloud cover,
etc. Thus, the definitions of twilight level are somewhat arbitrary, but have
endured for many centuries.
Best regards,
Jim
James E. Morrison
[EMAIL PROTECTED]
Astrolabe web site at astrolabes.org
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James E. Morrison
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Astrolabe web site at astrolabes.org
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ne interested in the details
should refer to the publications of David A. King. Oddly, only one gnomon used
for prayer purposes still exists (in Yemen).
Best regards,
Jim
James E. Morrison
[EMAIL PROTECTED]
Astrolabe web site at astrolabes.org
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rings)?. ? Hints on possible improvements, errors, bugs, are welcome.?
? Thanks Helmut Sonderegger Sonnengasse 24,? A-6800 Feldkirch
47.25 N,?? 9.59 E
?
James E. Morrison
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