How to Read a Sundial

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[briancelidonia]

Is there a good example of how to account for the varying lengths of day in the summer and winter? Seems like the dial is only accurate when the day is 12 hours long.

[jeffreywang]

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[aspiealpaca]

What about if you're on the equator, then which way do you point it?

[horizontbeskrajneinovacije]

The north on this sunclock is obviously represented by the star symbol between the phases of the moon...

[jeffreywang]

Sundials work by using the position of the sun and the shadow it casts to indicate the time. Here's how it works:

1. **Sun's movement:** The Earth rotates on its axis, causing the sun to appear to move across the sky from east to west throughout the day.

2. **Gnomon:** A sundial consists of a flat plate or surface with a raised, angled piece called a gnomon. The gnomon casts a shadow onto the surface of the sundial.

3. **Hour markers:** The sundial surface is marked with lines or numbers that correspond to the hours of the day.

4. **Shadow movement:** As the sun moves across the sky, the shadow cast by the gnomon changes position. The length and direction of the shadow vary throughout the day, depending on the sun's angle in the sky.

5. **Time reading:** By observing the position of the shadow cast by the gnomon, viewers can determine the approximate time of day based on the hour markers on the sundial surface.

Sundials are based on the principle that the sun's position in the sky changes predictably throughout the day, allowing people to track the passage of time using only the sun and a stationary object such as a sundial. They have been used for centuries as a simple and reliable method of timekeeping, although their accuracy may be affected by factors such as the season, latitude, and local topography.

[horizontbeskrajneinovacije]

There are no hemispheres but hemicircles....as the sun rotates above the earths surface...the path enclosed by the sun is north hemicircle, and the surface outside the sun path circle is opposite i e. South. If you are in a geographical location witin the circle path...you orient yourself tovards the south and opposite if the geographic location is outside of ring path area...then you look in direktion of north....shadow iis alwas behind the sun, and sun and Moon and stars all rotate from left to right body side...i.e. east to west...thus the north is by God creation positioned always within the circle of sun path...and this circle path is actually spiralling path...thats why we have seasonal wether changes...