Qi Yanhuai

Qi Yanhuai

Qi Yanhuai (1774-1841 A.D.), a native of Wuyuan (now Jiangxi Province), was named Mengshu, Meilu and Yinsan. He was born on October 12, the 39th year of Qianlong reign of Emperor Gaozong of Qing Dynasty (November 15, 1774), and died on June 25, the 21th year of Daoguang reign of Emperor Xuanzong (August 11, 1841). Jiaqing thirteen years (AD 1808) called to test the people. Next year, he will become a Jinshi and a Shuji in the Imperial Academy. Sanguan was awarded to the magistrate of Jingui County in Jiangsu Province. There were 19 poems about YaZhai Shubi. He was transferred to Suzhou Tongzhi, promoted to the magistrate, and Chen Haiyun was awarded the Zhiyou prize. Yan Huai's poems, which came to and from Korea and the Soviet Union, are especially good at parallel prose, calligraphy and collection. His works include twenty-six volumes of Meilu poetry anthology, one volume of Haiyun Nancao Congyi, four volumes of Polaris latitude table, one volume of Tianqiu Jianshuo and one volume of zhongxingyi Shuo, all of which are biographies of Qing history and handed down to the world.

Main achievements

Celestial globe

The celestial globe was made by Qi Yanhuai, a scientist in the middle of Qing Dynasty. Qi Yanhuai (1774-1841), whose name is Meilu, has made great achievements in astronomy and water conservancy. The celestial globe is a timing instrument made by him according to the astronomical phenomena. In the Qing Dynasty, European clocks and watches were introduced into China, and the structure of the celestial globe was imitated inside. It was driven by a spring and operated automatically to tell the time. The outer bronze sphere is cast with constellations. the celestial globe, like the copper pot drip, embodies the characteristics of ancient China's timing by using astronomical phenomena. However, the manufacture of the celestial globe has been influenced by the manufacture of European clocks and watches. the celestial sphere is made by drawing on a spherical surface the scales of several celestial coordinate systems, such as 88 constellations in the whole sky, names of stars as low as the fifth order, major nebular clusters, the twenty-eight constellations of ancient China, the equator, the ecliptic, the right ascension circle and the right ascension circle. in ancient China, the basic structure of the celestial phenomena demonstration instrument is identical with that of the celestial sphere. the celestial globe is made of transparent plastic with complete logo and a model of the earth inside, which is easy to understand the concept of the celestial sphere. It is suitable for astronomy and geography teaching in universities and middle schools. It is suitable for navigation and scientific research. It can be used to express the coordinates of the celestial sphere, the apparent motion of celestial bodies and solve some practical astronomical problems.

effect

The model of celestial sphere is a kind of auxiliary instrument for navigation, astronomy teaching and popularization of astronomy knowledge. People use it to express various coordinates of celestial sphere, apparent motion of celestial bodies and solve some practical astronomical problems. The spherical surface is painted with the location, name, constellation of the bright star and the marks and degrees of several celestial coordinate systems. The astrology on the celestial globe is just opposite to the astrology we see from the sky. This is because we look at the celestial globe from outside, but it has no effect on understanding the celestial phenomena. The celestial sphere can rotate around an axis that runs through the center of the sphere. This axis is called the celestial axis, and the two intersections of the two ends of the axis and the celestial sphere are called the South Pole and the North Pole. The celestial sphere with axis is supported on a metal meridian circle passing through the north and south poles. Using the celestial instrument, we can observe the star image at any given time and geographical latitude. Because the observer looks at the astronomical phenomena outside the celestial sphere, the astronomical phenomena seen from the celestial globe are opposite to those seen from the sky. However, this does not affect the practical value of the celestial globe. It is widely used in navigation, astronomy teaching and astronomy popularization. Put the celestial globe on a pedestal, and the horizontal circle in the pedestal represents the horizon circle. The user can adjust the height of the celestial pole on the meridian circle according to the geographical latitude, and can make the celestial sphere rotate around the polar axis, so as to see the star scene at different geographical latitude, at different dates and at different times, as well as the horizontal longitude (azimuth) and horizontal latitude (ground height) of a certain celestial body. It can also show the time and position of the sun, the path through the sky, the midday time, the height and the length of day and night. The astrolabe is of great practical value. On display at the Ancient Observatory in Beijing, China, is a bronze celestial globe of the Qing Dynasty. It was cast in 1673, with a diameter of 2 meters and more than 1000 stars on it. It is divided into three walls and twenty-eight constellations. The diameter of the commonly used celestial sphere is about 30 cm.

Main books

There are 19 YaZhai Shubi poems. He moved to Suzhou Tongzhi, promoted the magistrate, and Chen Haiyun to governor. He won the Zhiyou award. Yan Huai's poems, which came to and from Korea and the Soviet Union, are especially good at parallel prose, calligraphy and collection. His works include twenty-six volumes of Meilu poetry anthology, one volume of Haiyun Nancao Congyi, four volumes of Polaris latitude table, one volume of Tianqiu Jianshuo and one volume of zhongxingyi Shuo, all of which are biographies of Qing history and handed down to the world.

Chinese PinYin : Qi Yan Huai