Dear List Members (and experts!),
I am a new member to this Mailing List - a school-teacher who can see the
several curriculum benefits, of using sundials in (mainly Primary) schools.
One of my pupils recently asked me a question, which seemed simple - but
after thinking about it, now I am not s
On Wed, April 10, 2013 2:41 pm, Beverly Stimpson wrote:
>
> Dear List Members (and experts!),
>
> I am a new member to this Mailing List - a school-teacher who can see the
> several curriculum benefits, of using sundials in (mainly Primary)
> schools.
>
> One of my pupils recently asked me a quest
Yes, at the point of intersection they are, but don't forget though that
lat and long are great circles, not straight lines.
Of course, there is no east or west at the poles.
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https://lists.uni-koeln.de/mailman/listinfo/sundial
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From: Beverly Stimpson
To: sundial@uni-koeln.de
Sent: Wednesday, April 10, 2013 5:41 PM
Subject: Is East/West always at exact 'right-angles', to North/South?
Dear List Members (and experts!),
I am a new member to this Mailing List - a school-teacher who can see t
While longitude lines are great circles, latitude
lines are small circles.
> David Patte wrote:
> Yes, at the point of intersection they are, but don't forget though that
> lat and long are great circles, not straight lines.
>
> Of course, there is no east or west at the poles.
>
> -
True - correction accepted, except at the equator :)
I wonder if the poles have infinitely small latitude 'circles' ;)
On 2013-04-10 22:02, kool...@dickkoolish.com wrote:
While longitude lines are great circles, latitude
lines are small circles.
David Patte wrote:
Yes, at the point of inte
This would be the starting azimuth of the great circle
route from your location to Mecca. Here's a web page
that does this: http://www.qiblalocator.com/
> Douglas Vogt wrote:
> Reminds me of someone a year or so ago who developed a method of
> determining the east of Mecca for prayer purposes
water.
Looks to me that the Latitude/Longitude circles are all warping and
changing?
Do I have this correct?
Roderick Wall.
-Original Message-
From: David Patte ₯
Sent: Thursday, April 11, 2013 12:08 PM
To: sundial@uni-koeln.de
Subject: Re: Is East/West always at exact 'rig
Yes the distance around the equator is larger than twice the distance
from pole to pole. The flattening of the earth (oblateness) is minor
though. I can find the exact number if you are interested. I write
astronomy software that has to take this into effect.
actually - latitude (contrary to p
rom: David Patte â¯
> Sent: Thursday, April 11, 2013 12:08 PM
> To: sundial@uni-koeln.de
> Subject: Re: Is East/West always at exact 'right-angles', to North/South?
>
> True - correction accepted, except at the equator :)
>
> I wonder if the poles have infinitely sm
Direction of Mecca – A simple method
In any place in the northern hemisphere you can find the exact direction of
Mecca (qibla) by observing the direction of the Sun at the moment when it is
at zenith of Mecca itself.
We must observe the Sun on the day when its declination is equal to the
latitude o
Some years ago (1999) there was a short discussion, on Italian Mailing
List, on the sundials at the Pole: I tried to translate in (very bad)
English my considerations, that I sent also to the List
sundial@uni-koeln.de
I send again hoping not to bore those who have already read them and also
, 2013 1:23 PM
To: David Patte ₯ ; sundial@uni-koeln.de
Subject: Re: Is East/West always at exact 'right-angles', to North/South?
And at the Equator, would the Longitude circle be the biggest circle of them
all, because there is a bulge at the Equator. A bulge because the mass is
forced out due
Dear Gianni,
You give us a deligthful story.
I have a problem...
> ... the poles are singular points!
Yes, but these singular points do not
keep still!
> ...to keep always vertical without
> any movement...
Unfortunately, "polar wandering"
means that Mr Thin would have to
keep moving to stay
East and west can sometimes be pretty flexible. As a ship's navigator
long ago I was regularly asked by a delegate from our Muslim crew which
side Mecca was, so that they could pray correctly. "Port" or "starboard"
was sufficient answer.
Frank 55N 1W
:sundial-boun...@uni-koeln.de] On Behalf Of Douglas Vogt
Sent: Thursday, 11 April 2013 10:57
To: sundial@uni-koeln.de
Subject: Re: Is East/West always at exact 'right-angles', to North/South?
Reminds me of someone a year or so ago who developed a method of determining
the east of Mecca for
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