The history of sundials, and how to make your own

A sundial is a device that tells the time of day when there is sunlight by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial.

As the Sun appears to move across the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day.

In this video, you’ll learn even more about the history of sundials and then discover easy steps to make one of your own!

View the original video here.

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