I have been half-heartedly attempting -- with my shaky grasp of
trigonometry -- to figure out where the sun rises and sets at the
Solstices. One should, I think, be able to read this directly off the face
of a sundial, given the time of sunrise/sunset on the solstice.
I found a web site with a java applet that will perform that calculation,
given your latitude, longitude, time zone, etc. I found another that
claimed that the answer is simply (1/cosine * latitude) -- which did not
agree with the result from the java applet. I think the applet is probably
correct.
Is there a straightforward formula that gives the azimuth of sunrise at the
solstice as a function of one's latitude?
Jack
At 05:25 AM 12/23/2007, Peter Mayer wrote:
Hi,
The recent discussion of Newgrange reminded me of a minor, domestic
example
from Down Under.
In 2002 we undertook major renovations to our 1880s stone
cottage. Among the
major changes (a new storey, etc.) one minor change involved shifting the
location of the east facing door. When, 18 months later, we moved back
into the
house, we found--to our great delight--that quite inadvertently the door
and the
passage leading to it were nearly perfectly aligned with the Southern
Hemisphere
solstice. It isn't Newgrange! but the sunrise light flooding in for a brief
period in summer is an arresting experience.
This photo was taken on 20 December (taken early because the weather bureau
correctly predicted clouds and rain on the solstice). It was taken about 15
minutes after the time of sunrise so that the Sun could clear the trees on the
horizon.
best Holiday wishes,
Peter
--------------------------
Peter Mayer
Politics Department
The University of Adelaide, AUSTRALIA 5005
Ph : +61 8 8303 5606
Fax : +61 8 8303 3443
e-mail: [EMAIL PROTECTED]
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