Traditional Culture Encyclopedia - Almanac inquiry - What does the sundial think of time solution?
What does the sundial think of time solution?
1. In the morning, the shadow is cast near Shi Mao at the western end of the disc.
When the sun reaches the highest position due south, the needle shadow is located due north, indicating the local noon time.
In the afternoon, the sun moves to the west, and the shadow of the sun tilts to the east, pointing to each hour in turn.
Brief introduction of sundial
A sundial is a device that tells the time according to the position of the sun. It is a great invention of human beings in the field of astronomical timing, which has been used for thousands of years. A sundial usually consists of a dial and a dial, and the time is measured and divided by the projection direction of the sun.
A sundial usually consists of a copper pointer and a stone disk. The copper pointer is called "dial needle", which passes through the center of the disk vertically and acts as a neutral rod in a standard watch, so the dial needle is also called "watch". The stone disc is called "tile surface" and placed on a stone platform, which is high in the south and low in the north, so that the tile surface is parallel to the equator of the celestial sphere, and the upper end of the tile needle points to the north celestial pole and the lower end points to the south celestial pole.
There are scales on both sides of the coffin. There are twelve hours of molecules, ugly, yin, Mao, Chen, Si, noon, Wei, Shen, You, Xu and Hai. Each hour is divided into "start time" and "correct time" on average, and a day is exactly 24 hours. Most sundials show apparent solar time, and the design of some of them has been changed to show standard time or daylight saving time.
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