2022年3月27日 · First, I give some background information on sundials and the different types you might encounter. Then, I go right into how to properly set up a sundial and how to read the time using the...

2021年3月21日 · This Brass Sundial came from an Estate. I did some research to learn how to use it and thought I would put together a short video on it. It has a pretty high...

2018年4月15日 · Here's how and when to set a sundial for it to tell time accurately. Includes a list of best dates to set it.

2016年10月12日 · Almost every sundial has two basic parts: the pointer and the dial. The pointer, also called a style or gnomon, casts a shadow, indicating the time of day. The numbered dial is the area in which the shadow falls, showing the hour.

To read a sundial, first place the sundial on a flat surface in a sunny spot. Rotate the sundial so the gnomon, or the pin on the sundial that casts a shadow, is pointing north if you’re in the northern hemisphere or south if you’re in the southern hemisphere.

Reading the time on a sundial is really quite easy. In bright sunshine the gnomon on the sundial casts a clear shadow, which shows the time. Only the idea of using the sun to find the time is unfamiliar nowadays. The shadow slips past each of the hour lines rather like a clock hand.

2009年9月24日 · Sundials indicate time by casting the sun's shadow onto a surface (known as a dial) that is inscribed with numbers or symbols representing hours in the day. With some models, it's also possible to determine the month or day of the year, and get information on the horizon and the equator.

Use the Sundial Shadows web app to visualize, conceptualize, estimate, and use shadows and shadow traces as a clock, calendar, and compass. View the shadows for any latitude, day, and time, and try the unlimited number of challenges that provide visual feedback based on …

2024年11月30日 · To decipher the secrets of a sundial, you must first understand its fundamental principle. Sundials harness the Earth’s rotation and the sun’s position in the sky. As the sun traverses its celestial arc, its rays strike the sundial’s gnomon, a triangular or rod-like structure that casts a shadow.