Franz Mattle from Berndorf in Austria has published a booklet called
'Sonnenuhren - Dokumente der Zeitmesskunst' (which means something like:
sundials - documents about the skill in the measurement of time)
It contains many pictures of sundials in the region of the Innviertel
(section of the
Jack Aubert,
Your question was : 'Why the earliest sunset is at 13 dec'?
Only looking to the aspect of the declination of the sun in december the
length of a day wil shorten so the sun will set earlier each day till
about 21 december. From then the length of the days will increase.
In this
On Fri, 3 May 1996, Jack Aubert wrote:
I would like to forward the following enquiry to all those dialiasts
who know more than I do about celestial mechanics. It seems to me
that the answer has something to do with the fact that the sun appears
as a disk rather than a point in space, but I
One thing to keep in mind: the zero point of the Equation of Time is
*not* arbitrary, but comes from the shape of the analemma (or equivalently
from the shape of the earth's orbit and orientation of its north pole).
The Equation of Time is the difference between apparent solar time
(tied to the
According to my Soda Can Dial, the earliest sunset appears to be around 11 Dec
(at least for Washington, D.C.) and the latest on July 2. I don't know if that
is true everywhere (in fact, I doubt it).
Brad
