You can build one of these.
https://www.mysundial.ca/sdu/sdu_wall_declinometer.html
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Michael
Ossipoff
Sent: July 1, 2023 1:07 PM
To: Jeffery Brewer; sundial list
Subject: Re: Question About Measuring Wall Declination
I
I realize that you’ve already gotten good answers, but I’d like to say a
few things too.
…
I’m really late replying, because I’ve been trying to figure out how to
word answers to a few long assertion-posts from the usual confused
self-sure kids at a philosophical forum. After this time, I’m going
Hi Jeffery you are actually calculating the horizontal angle indicated as
'angolo' on the diagram below
ie. deviation of the Sun from the wall under consideration.
Hope this helps,
Alexei
[image: image.png]
On Mon, 26 Jun 2023 at 16:37, Jeffery Brewer
wrote:
> I'm attempting to measure the dec
I'm attempting to measure the declination of a wall using a method
described on this web page of The Sundial Primer
https://www.mysundial.ca/tsp/wall_declination.html (also described in
"Sundials: Their Theory and Construction" by Albert E Waugh Chapter 10).
Referring to Figure 1 of The Sundial Pr
>>
>> Michael Ossipoff
>> 16 Tu
>> Aries 19th
>> Aprilis 7th
>>
>> On Tue, Apr 7, 2020 at 7:07 AM Peter Mayer
>> wrote:
>>
>>> Hi,
>>> Dan-George Uza's recent post reminded me of a question I have. I was
>>> looki
Hi,
> Dan-George Uza's recent post reminded me of a question I have. I was
> looking at Mark Lennox-Boyd's lovely *Sundials* the other day, especially
> photos of some of the beautiful Renaissance ivory diptychs, and realised
> that I didn't understand the principles be
Peter Mayer wrote:
> Hi,
> Dan-George Uza's recent post reminded me of a question I have. I was
> looking at Mark Lennox-Boyd's lovely *Sundials* the other day, especially
> photos of some of the beautiful Renaissance ivory diptychs, and realised
> that I didn't und
You might look here and see if anything helps.
http://www.moonstick.com/
---
On 2020-02-04 09:48, David Benton wrote:
So I’ve been trying to find detailed information on Moondials and how
to make them. Unfortunately, I’ve not found much out there on the
subject.
Does anyone here in our group
I am no expert in moondial work. Most seem to use the standard sundial
approach with corrections.
The approach I used works for me. It has you set the dial calibration at
the start of a lunar cycle which removes some variables. I use a cylinder
as the dial plate. As I said it works and it works f
So I’ve been trying to find detailed information on Moondials and how to make
them. Unfortunately, I’ve not found much out there on the subject.
Does anyone here in our group have experience with making Moondials or have any
related links that could be helpful?
Are they made the same as sundi
Thank you to everyone who has replied to my question about the labeling
of noon.
Summary of responses received:
Due to space constraints, a label of XII is sometimes replaced by
something narrower. I'll hazard a guess that the use of Roman I, in the
example I saw at Knox United C
8 12:16 AM
To: Steve Lelievre<mailto:steve.lelievre.can...@gmail.com>
Cc: Sundial sundiallist<mailto:sundial@uni-koeln.de>
Subject: Re: Hour label question
Hi Steve,
my first thought: I (as XII) as single line to be correct at the noon line.
Getting the geometrical center of XI
ttps://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *Kurt Niel
> *Sent: *September 25, 2018 12:16 AM
> *To: *Steve Lelievre
> *Cc: *Sundial sundiallist
> *Subject: *Re: Hour label question
>
>
>
> Hi Steve,
>
>
>
> my fi
As XII is a large number 0 is often used for noon.
Roger Bailey
Sent from Mail for Windows 10
From: Kurt Niel
Sent: September 25, 2018 12:16 AM
To: Steve Lelievre
Cc: Sundial sundiallist
Subject: Re: Hour label question
Hi Steve,
my first thought: I (as XII) as single line to be correct at
Hi Steve,
my first thought: I (as XII) as single line to be correct at the noon line.
Getting the geometrical center of XII is not that easy.
Kurt
Steve Lelievre schrieb am Mo., 24. Sep.
2018, 22:55:
>
> Today I visited a sundial that I had not viewed before.
>
> I got myself in quite a muddle
Today I visited a sundial that I had not viewed before.
I got myself in quite a muddle when I tried to check its technical
quality. The first thing I looked for was a noon gap. There was none but
I noted the noon position was labeled with a roman number I, which I
took to mean the hours are
While I am truly fond of analog clocks, certainly including sundials, I
also have a place in my heart for interesting digital clocks. Hence, I
still have two Heathkit "Most Accurate Clocks," model GC-1000, that run
24/7 and have done for 30 years. This red LED digital clock sets its
time from W
olled clock. The firmware is written in the C
programming language. And is available if you want to make it work the way you
want it to.
Have fun,
Roderick Wall.
- Reply message -
From: "Brooke Clarke"
To: "rodwall1...@gmail.com" , "sundial list"
Subject:
Reply message -
From: "Brooke Clarke"
To: "sundial list"
Subject: Time question on GPS TIME and leap second.
Date: Thu, Feb 2, 2017 9:26 AM
Hi Roderick:
GPS knows about neither daylight savings nor the date.
The article mentions "understands the rules of daylight saving (DST
play around with it if you want.
Article also gives a web link for the free Hi-Tech C Compiler.
I'm waiting to see if a local electronic supplier produces a kit of parts for
it.
Looks like fun,
Roderick Wall.
- Reply message -
From: "Brooke Clarke"
To: "sundial list
cle on the GPS analog clock driver. A better description;
http://archive.siliconchip.com.au/cms/A_92/article.html
Roderick Wall.
- Reply message -
From: "Richard Langley"
To: "Brooke Clarke" , "sundial list"
Subject: Time question on GPS TIME and leap sec
A recent article on the GPS analog clock driver. A better description;
http://archive.siliconchip.com.au/cms/A_92/article.html
Roderick Wall.
- Reply message -
From: "Richard Langley"
To: "Brooke Clarke" , "sundial list"
Subject: Time question on GPS T
daylight saving.
Thanks all,
Roderick Wall.
- Reply message -
From: "Brooke Clarke"
To: "sundial list"
Subject: Time question on GPS TIME and leap second.
Date: Tue, Jan 31, 2017 7:29 AM
Hi Roderick:
GPS time is continuous, that's to say there are no leap second
behalf of Brooke Clarke
Sent: Monday, January 30, 2017 4:29 PM
To: sundial list
Subject: Re: Time question on GPS TIME and leap second.
Hi Roderick:
GPS time is continuous, that's to say there are no leap seconds or other
changes to it since it started. It uses a 10 bit binary week counter
that the GPS gives us UTC time.
Question:
The UTC time that the GPS gives. Does that have the leap second added?
Thanks,
Regards,
Roderick Wall.
- Reply message -
From: "Michael Ossipoff"
To: "Robert Kellogg"
Cc: "sundial list"
Subject: Why we should re
__
From: sundial on behalf of Richard Langley
Sent: Sunday, January 29, 2017 7:02 PM
To: rodwall1...@gmail.com
Cc: sundial list
Subject: Re: Time question on GPS TIME and leap second.
Yes. The navigation message transmitted by GPS satellites includes the current
leap second o
ichard
Langley
Gesendet: Montag, 30. Januar 2017 00:02
An: rodwall1...@gmail.com
Cc: sundial list
Betreff: Re: Time question on GPS TIME and leap second.
Yes. The navigation message transmitted by GPS satellites includes the
current leap second offset so a receiver can compute and display corre
dwall1...@gmail.com>> wrote:
Hi all,
Was just listening to the CrowdScience on time. Thanks to whoever posted the
link to it.
CrowdScience indicated that a leap second was not added for the GPS. They also
indicated that the GPS gives us UTC time.
Question:
The UTC time that the GPS gives. Does t
Hi all,
Was just listening to the CrowdScience on time. Thanks to whoever posted the
link to it.
CrowdScience indicated that a leap second was not added for the GPS. They also
indicated that the GPS gives us UTC time.
Question:
The UTC time that the GPS gives. Does that have the leap second
HI Group,
The link in the message from clar...@aol.com below has this link on
the page also
An Intrinsic Representation of the Equation of Time - 2014-2017 - a .pdf file.
This example is for Greenwich - contact me (ke...@karney.com) for a
version for your own locality
and the Nodebox 1.9.7 python
Frank King wrote:
> The U.K. telephone-service speaking clock gets it right too but only by
> a fudge. You hear:
>
> At the thiiird stroke...
>
> with a bit of noise in "third"!
The recording I have heard has the usual three pips, but with two seconds
between the second and third pips
ing and that your alarm
> clock didn't go off one second early.
>
> Here is an easy question to start off
> the New Year...
>
> Every Sunday at 08:00 I check the first
> stroke of the hour-bell of the University
> Clock against a radio-controlled UTC clock.
>
> If it is
Dear All,
Many interesting comments...
David Brown wrote:
> ...the place where you add/remove the coins
> is below the current C.G.
This is a theoretical possibility but all
the large pendulum clocks I have looked
at have an annular tray round the shaft
ABOVE the pendulum bob...
There are good
1, 2017 7:20 AM
To: "Frank King" ;
Subject: Re[2]: Leap Second Quiz Question
Frank wrote:
<>
I was at a talk recently by a guy who was promoting the use of tidal
energy.
(You know what you are going to get every day was his main theme"
At the end he invited questi
_
From: sundial on behalf of Dave Bell
Sent: Sunday, January 1, 2017 2:24 PM
To: 'David'; sundial@uni-koeln.de
Subject: RE: Leap Second Quiz Question
Logically, tidal power should slow the Earth’s rotation.
Mechanical energy, imparted by the combined gravitation of the Sun
s
rotation.
Now, does the extracted energy also slow the Moon's revolution about the
Earth?
Dave
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of David
Sent: Sunday, January 1, 2017 7:19 AM
To: sundial@uni-koeln.de
Subject: Re: Leap Second Quiz Question
On 01/01/2017 12
On 01/01/2017 12:30, Frank King wrote:
Dear All,
I hope you all enjoyed the extra second
in bed this morning and that your alarm
clock didn't go off one second early.
Here is an easy question to start off
the New Year...
Every Sunday at 08:00 I check the first
stroke of the hour-bell o
Frank wrote:
<>
I was at a talk recently by a guy who was promoting the use of tidal
energy.
(You know what you are going to get every day was his main theme"
At the end he invited questions, so I asked if the generation of
electricity by the use of tidal power would slow down the earth or mo
Dear All,
The voting pattern has swung away from
1.5s to 0.5s and we shall see whether
this trend continues!
There is an embellishment to Mike Shaw's
comment:
The radio clock stopped for 1 second
at midnight
This isn't quite what happens. Indeed,
there seems not to be a general pattern.
T
Patrick Vyvyan
Sent: Sunday, January 1, 2017 9:54 AM
To: Richard Langley
Subject: Re: Fw: Leap Second Quiz Question
0.5 seconds for me!
It's not exactly the fault of your clock's mechanism that due to the foibles of
the IERS, the rules of the game have been changed. Every time a
Well I think I'll go for 0.5 seconds.
Frank's clock has apparently gained 1.5 seconds in the week.
The radio clock stopped for 1 second at midnight, but Frank's didn't and
so gained 1 second.
Mike Shaw
---
https://lists.uni-koeln.de/mailman/li
of Frank King
Sent: Sunday, January 1, 2017 8:30 AM
To: sundial@uni-koeln.de
Subject: Leap Second Quiz Question
Dear All,
I hope you all enjoyed the extra second
in bed this morning and that your alarm
clock didn't go off one second early.
Here is an easy question to start off
the New Year...
Dear All,
I hope you all enjoyed the extra second
in bed this morning and that your alarm
clock didn't go off one second early.
Here is an easy question to start off
the New Year...
Every Sunday at 08:00 I check the first
stroke of the hour-bell of the University
Clock against a
>
> I printed on a sheet of 420x297 mm (A3)
>
> The gnomon I use is ¼ " diameter as shown in the photo. (Photo 1)
>
>
>
>
>
> Photo 2 a better look what I see
>
>
>
>
>
> The question is, can separate lines at Noon (12:00) as show
Hi Dan,
You are asking the right questions. How large should the dial be, considering
the users, adults or children? To answer this question I wrote a spreadsheet
that calculated how long the shadow would be on any given date and height of
the gnomon. Helmut Sonderegger improved the spreadsheet
Dan,
A good site for answers on your questions is:
http://www.fransmaes.nl/zonnewijzers/welcome-e.htm --> analemmatic --> the
human scale
The website in Croatia recommended by Martina Addiscott is giving false
indications
- the sundials provide a correction for the official time while a sundia
In message
Dan Uza wrote:
> Hello,
>
> From your experience, what is the best analemmatic sundial size to be set
> up at a children playground? I was thinking about a width of 5.4 meters,
> the base consisting of a row of 4 concrete pavement tiles (40x40 cm) and 12
> other smaller til
Hello,
>From your experience, what is the best analemmatic sundial size to be set
up at a children playground? I was thinking about a width of 5.4 meters,
the base consisting of a row of 4 concrete pavement tiles (40x40 cm) and 12
other smaller tiles for the hours. Should their surface be more smo
, which is probably stronger than silicone caulk, try to get a
flexible epoxy.
Jack Aubert
From: KDConod [mailto:kdco...@yahoo.com]
Sent: Thursday, June 25, 2015 12:09 PM
To: sundial@uni-koeln.de
Subject: Sundial mounting question
Hello Sundialers --
I used to lurk on this
I realize that methods for solving equations that don't have an exact
solution ( a solution in closed form) might be a little off-topic here.
But, indirectly, it's a sundial question, because most likely there are
sundial problems that result in equations without an exact solution.
F
ould also like to take a turn and ask a question to the mathematically
> inclined:
>
> I have been trying to figure out how to plot the duration of daylight over
> the course of the year as a function of latitude. (I would generate a curve
> for each latitude I am interested i
Hi Jack,
Let me offer the solution to a related question that came up while hiking
with friends around the time of the solstice. One friend asked
about the changes he had noticed in the times of sunrise and sunset near
the solstice. Sunrise kept getting later after the solstice but sunset
OK, I would also like to take a turn and ask a question to the mathematically
inclined:
I have been trying to figure out how to plot the duration of daylight over the
course of the year as a function of latitude. (I would generate a curve for
each latitude I am interested in.)
I believe
Thanks to everyone who replied with suggestions, both on and off the list.
When I asked my question, I assumed there was a trivial solution that could be
simply explained. I realize now that the calculations are not straightforward.
Roger Bailey has given me an approach that I believe will
Hello John,
I routinely use Napier's Analogue as suggested by Fred Sawyer when I asked
this question several years ago. This involves an intermediate step
involving an angle B. Here are the formulae.
Napier's Analogues: Knowing Latitude, Declination and Azimuth, Solve for
Al
The USNO Webpage
http://aa.usno.navy.mil/data/docs/AltAz.php
will also compute elevation angle (altitude) and azimuth of the sun for a given
date and location at specified intervals.
On Saturday, January 31, 2015, 31, at 12:31 PM, Bill Gottesman wrote:
> You can download a free excel spreadsheet
You can download a free excel spreadsheet, sunpositioncalculator at
http://precisionsundials.com/sunpositioncalculator.xls. The Azimuth page
allows you to input date, latitude, longitude, and azimuth, and it gives
you the civil time, eot, declination, and altitude. When opening, you must
allow ma
If you know the zenith distance, z, of the sun (90° - elevation angle) as well
as the azimuth (A) then you could use:
sin(h) = -sin(z)*sin(A)/cos(delta)
where delta is the sun's declination. The latitude of the site, phi, is not
needed.
Computing the hour angle when the zenith distance is not
Dear dialists,
Does anyone know a formula for calculating the hour angle given the azimuth,
declination, and latitude?
I’d like to know the time of day, throughout the year, when the sun will be
positioned at a particular angle. This will allow me to determine when sunshine
will stream square
forlearning.com
On Wed, Apr 3, 2013 at 1:06 AM, Richard B. Langley wrote:
> Question #4 is one that many adults don't know the answer to. There have
> been whole books written about it including Why the Sky Is Blue:
> Discovering the Color of Life by Gotz Hoeppe, translated by J
No answer but an anecdote.
When my son was 3 years old, he walked very proudly with a stick as walkers do
with a cane.
After some time he came running towards me.
He had seen the shadow of the stick and told me weeping: "another stick always
comes to mine"
Willy Leenders
Hasselt in Flanders (Be
The answer a mother would give to question 3 is simple "ask your father".
Dennis
Sent from my samsung mobile on O2
Frank King wrote:
Dear All,
Widely reported in U.K. news reports
today are the top five questions
that children ask their mothers:
1) Why is water wet?
2) Wher
Dear All,
Widely reported in U.K. news reports
today are the top five questions
that children ask their mothers:
1) Why is water wet?
2) Where does the sky end?
3) What are shadows made of?
4) Why is the sky blue?
5) How do fish breathe under water?
I am delighted to note that chil
Good morning,
Thanks to Kevin Karney and David Pawley, my mysterious Astro Compass base has
been identified. I LOVE the Sundial List!
Looks like my deductions were right, but I had no idea that the base (which
David Pawley told me is correctly called a "standard") could be used for both a
magn
John
I think the base is such that either an Astro Compass could be mounted - or a
normal magnetic compass with the same fitting. The screws on the side of the
mount are connected to two little magnets inside the base. These are used to
compensate for the magnetism of the plane's fuselage. I wou
-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of ??
Sent: Saturday, October 29, 2011 9:29 AM
To: sundial@uni-koeln.de
Subject: Re: Question about the quadrant instrument
Hi Gianni,
Thank you very much for your valuable reply. I really benefits from your
explanation and
Hi Gianni, Thank you very much for your valuable reply. I really benefits from
your explanation and figure. The values written on the edges are Arabic letters
written with "Kofi's Handwriting" in Arabic "الخط الكوفي" . every letter
indicates a number. according to this table with regular handwr
This article raises the possibility that Mousa broch was a sky observatory
any comments welcome
http://intarch.ac.uk/journal/issue30/thomas_index.html
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
:
From: Frans W. Maes
Subject: Fwd: Re: Question on a possible sundial.
To: "Sundial List" , electr0magn...@msn.com
Date: Friday, 19 August, 2011, 20:19
Hi all,
Thanks to the increased attachment size I can post the illustrated question of
Duncan Meyers to the list, together with
,
Thanks to the increased attachment size I can post the illustrated
question of Duncan Meyers to the list, together with my initial
response. Any additional suggestions regarding the nature of this
object?
Best regards,
Frans Maes
In message
William Irvine wrote:
> In message
>
> Donald Christensen wrote:
>
> > I have lots of analemmatic sundials pics. However, I can't find any in
> > gardens.
> >
> > I'm after a pic. the more vegitation the better. Can anyone help?
> >
>
> Dear Donald,
>
> No
Hello,
I'd like to propose a 3-way link swap with your website
http://www.sundials.org, where you receive 2 links in exchange
for one of yours.
3-way linking is a very effective link building strategy. Since you're getting
the links from third party websites, they appear
totally natural to sear
Don't forget the beautiful Missal of St Leofric 10-11th Century for an elegant
but simple shadow length table
---
That is a common table used mostly in calendars. It is a variantof the same
model of St. Gallen abbey (there is a little error made by the scriba monk).
As I wrote, that
The data that you show looks very similar to the Venerable Bede's shadow length
tables (though the values are slightly different). This gives the length of a
person's shadow on the assumption that their height is equal to six of their
own feet (tall people generally have big feet!). But the hour
JOHN DAVIS
> Sent: Wednesday, March 09, 2011 5:13 AM
> To: Sundial Mailing List; Bill Gottesman
> Subject: Re: A 14th century sundial question from France.
>
> Hi Bill (and other dialling colleagues),
>
> The data that you show looks very similar to the Venerable Bede
09, 2011 5:13 AM
To: Sundial Mailing List; Bill Gottesman
Subject: Re: A 14th century sundial question from France.
Hi Bill (and other dialling colleagues),
The data that you show looks very similar to the Venerable Bede's shadow length
tables (though the values are slightly different).
table, to be found in an Anglo-Saxon
manuscript.
Regards,
John
-
Dr J Davis
Flowton Dials
--- On Wed, 9/3/11, Bill Gottesman wrote:
From: Bill Gottesman
Subject: A 14th century sundial question from
Richard Kremer, the Dartmouth physics professor who brought the ~1773
Dartmouth Sundial to display at the NASS convention this past summer,
asked me the following question. I have done a bit of modelling on it,
and have not been able to supply a satisfactory answer. Is anyone
interested in
quot;
To: "R Wall" ; "Fabio Savian"
;
Sent: Sunday, May 24, 2009 9:40 AM
Subject: Re: A Sun Path question
> Roderick,
>
> The sun doesn't give its real postion on the map but only the azimuth of
> the sun relative to the pointer of your place.
>
>
long. 5:30 E
- Original Message -
From: "R Wall"
To: "Fabio Savian" ;
Sent: Saturday, May 23, 2009 9:08 PM
Subject: Re: A Sun Path question
Hi Fabio,
I've just had a play with your program and it looks good.
I put in my location which is near Melbourne Au
- Original Message -
From: "Fabio Savian"
To:
Sent: Saturday, May 23, 2009 2:20 AM
Subject: Re: A Sun Path question
I've just updated a page where choosing any coordinates on a Google map or
by digiting them, you can get some astronomic data.
The data are updated every second
Hi Valentin
Before you start using some link, test other alternatives too.
I have found that their accuracy varies quite a lot. Please find
below my favorite links.
http://www.roman-britain.org/astronomy/astro.htm
http://aa.usno.navy.mil/data/
http://www.srrb.noaa.gov/highlights/sunrise/azel.html
Fabio Savian wrote:
> I've just updated a page where choosing any coordinates on a Google map or
> by digiting them, you can get some astronomic data.
> The data are updated every second:
> www.nonvedolora.it/gnomonica/coordinate.php?lingua=en
> The data are: system clock, GMT 0, EoT, true local
T +2)
- Original Message -
From: "Valentin Hristov"
To:
Sent: Friday, May 22, 2009 2:07 PM
Subject: A Sun Path question
> Dear Sundial Friends,
> I have seen a web page giving a (java) graph of the position of the Sun
> with the azimuth on the horizontal axis and
Damia Soler
Sent: Friday, May 22, 2009 8:28 AM
To: valhr...@bas.bg
Cc: sundial@uni-koeln.de
Subject: Re: A Sun Path question
Hello all!
> I have seen a web page giving a (java) graph of the position of the Sun
> with the azimuth on the horizontal axis and the height on the vertical
>
Valentin, you can also get the sun path for any location, both in x/y or polar
graph, with Orologi Solari.
See the attached example.
Greetings.
Gian Casalegno
>Messaggio originale
>Da: valhr...@bas.bg
>Data: 22/05/2009 14.07
>A:
>Ogg: A Sun Path question
>
>Dear Sun
Hello all!
> I have seen a web page giving a (java) graph of the position of the Sun
> with the azimuth on the horizontal axis and the height on the vertical
> axis for arbitrary coordinates.
> Unfortunately, I have lost the web address.
> I tried Google, but perhaps I do not use the proper way
Dear Sundial Friends,
I have seen a web page giving a (java) graph of the position of the Sun
with the azimuth on the horizontal axis and the height on the vertical
axis for arbitrary coordinates.
Unfortunately, I have lost the web address.
I tried Google, but perhaps I do not use the proper way of
Hello all sundial lovers
Do you remember my game:
http://pagesperso-orange.fr/cadrans.solaires/cadrans/cadrans-interactifs.html
Let us point out the clues, some were useless:
- it has got 4 CDs==> BAD CLUE
- the CDs are on a helix ==
Hello all sundial lovers
I have a gnomonic game for you (in French and English only, sorry for Italian
people):
How to read the time on this dial
http://pagesperso-orange.fr/cadrans.solaires/cadrans/cadrans-interactifs.html
Here are some clues, warning some are useless:
- it has got 4 CDs
- t
Maybe it could be useful to simulate the Oughtred dial at the Arctic Circle
with Orologi Solari.
Greetings.
Gian
>Messaggio originale
>Da: brad.luf...@ngc.com
>Data: 16/01/2009 16.55
>A: "John Goodman",
>Ogg: RE: Interesting "Day" Question fro
ial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de]
On Behalf Of John Goodman
Sent: Thursday, January 15, 2009 5:10 PM
To: sundial@uni-koeln.de
Subject: RE: Interesting "Day" Question from the mind of a child
On Jan 15, 2009, at 1:58 PM, Lufkin, Bradley (MS wrote:
> Here's
the 21st of June (but just barely).
> Brad
It's nice to see a graphical answer to the question!
How was this sundial illustration created? Is there a software
application that can create a chart like this for any place on earth,
at any time of year?
Thanks for any additional
ndial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de]
On Behalf Of rlh...@comcast.net
Sent: Thursday, January 15, 2009 1:49 PM
To: amc21...@yahoo.com; Sundial List
Subject: Re: Interesting "Day" Question from the mind of a child
The appropriate answer for a 7 year old is "
a very interesting question which I am happy
> to
> forward to you because it is well beyond my ability to answer.
>
> So here it is:
>
> Is there a place on the surface of the earth where the sun will rise at
> midnight
> on the longest day of the year and then set at
Dear Andrew,
I think your 9-year old step son needs
a lesson on the theory of limits but
meantime he needs an answer to his
question:
> Is there a place on the surface of the
> earth where the sun will rise at midnight
> on the longest day of the year and then
> set at the next midni
All,
My 9-year old step son asked me a very interesting question which I am happy to
forward to you because it is well beyond my ability to answer.
So here it is:
Is there a place on the surface of the earth where the sun will rise at
midnight on the longest day of the year and then set at
Dear All,
I wonder whether anyone familiar with Scandinavian
sundial terminology could fill in the blank in this
translation table for me...
ITALIANorologio solaremeridiana
ENGLISHsundialnoon mark
SCANDINAVIAN solskive
In short, I am
Many thanks, Fer and Gianni!
You are right, Fer, I did mean 5 am to 7 pm. My mistake. I meant to ask for
plus or minus 5 hours, 6 hours, and 7 hours from noon.
Using 37.72N rather than 38N, the results are
+/- 5 hours 21.46 from vertical or 68.54 above horizon
+/- 6 hours 52.28 from vert
ng
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
From: [EMAIL PROTECTED]
To: sundial@uni-koeln.de
Sent: Friday, May 11, 2007 7:00 PM
Subject: spherical geometry question
This
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