2017

NY4348 : Sundial at Wreay

taken 7 years ago, near to Wreay, Cumbria, England

Sundial at Wreay
Sundial at Wreay
Rather pointlessly located under the shade of a large and presumably ancient yew in the churchyard of St Mary's.
Sundials

A sundial is a device that tells the time of day by the apparent position of the Sun in the sky. In common designs such as the horizontal sundial, the sun casts a shadow from its style onto a surface marked with lines indicating the hours of the day. The style is the time-telling edge of the gnomon, often a thin rod or a sharp, straight edge. As the sun appears to move across the sky, the shadow-edge aligns with different hour-lines. Those sundials that directly measure the sun's hour-angle by the shadow of an edge must have that edge parallel to the axis of the Earth's rotation to tell the correct time throughout the year. The style's angle from the horizontal will thus equal the sundial's geographical latitude. It is common for inexpensive mass-produced decorative sundials to have incorrect hour angles, which cannot be adjusted to tell correct time.


Creative Commons Licence [Some Rights Reserved]   © Copyright Tiger and licensed for reuse under this Creative Commons Licence.
This photo is linked from: Automatic Clusters: · Churchyard [8] · Churchyard of St [5] ·
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NY4348, 103 images   (more nearby 🔍)
Photographer
Tiger   (more nearby)
Date Taken
Friday, 5 May, 2017   (more nearby)
Submitted
Saturday, 6 May, 2017
Subject Location
OSGB36: geotagged! NY 4352 4891 [10m precision]
WGS84: 54:49.9092N 2:52.8463W
Camera Location
OSGB36: geotagged! NY 4352 4891
View Direction
North-northeast (about 22 degrees)
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Image Type (about): close look 
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