What is the omnipotent "Qin" in TV series in history?

The most important institution for studying astronomy in ancient times was Qin, which is equivalent to the current National Astronomical Observatory and Meteorological Bureau. Its main work is to observe astronomical phenomena, calculate solar terms and make calendars. I saw this name today and it was not fixed until the Ming Dynasty. Although there were similar functional departments in past dynasties, they were mainly named Taishigong.

The compilation and revision of Xia, Shang and Zhou calendars were mainly completed by Tai Shigong. The work of Taishiling in Qin and Han Dynasties was replaced by Taishiling, who was still responsible for compiling legislation in Wei and Jin Dynasties, but they were deprived of the function of compiling history books. During the Tang and Song Dynasties, the names of such institutions changed back and forth, such as the four-day prison, the four-day roof, the Taishiju, the Huntian prison and so on. In the Yuan Dynasty, it was renamed Taishi Museum. The name of Qin was formally adopted in the Ming and Qing Dynasties. ?

Taishigong held an important position in the pre-Qin period. He was not only responsible for compiling and editing history books and managing atlas of laws and regulations, but also for revising calendars, observing astronomical phenomena, calculating solar terms, and even appointing and dismissing officials. He had certain administrative power. In the Qin and Han Dynasties, Tai Shigong's power was gradually weakened, leaving only the work of repairing history books and calendars. During the Wei and Jin Dynasties, the work of compiling history books was assigned to writers, while Tai Shigong's work was only to observe the astronomical phenomena and compile calendars. Taishi has changed from the original core department to the current Qingshui yamen, and has become a pure technical official. If you want to be a teacher or be in charge of Qin Tianjian, you must be a master of astronomy and geography, which requires high technology and professionalism.

The most famous person in this field is Sima Qian, who wrote the best historical records. He is Taishiling. He is not only proficient in historical classics, but also has a good knowledge of astronomical calendars. His astronomical attainments are mainly reflected in his three articles: official book, almanac and dharma book. Zhang Heng of the Eastern Han Dynasty is a big shot in the history of science and technology in China, and is known as the Da Vinci of the East. Everyone knows that he invented the seismograph. He is not only an astronomer, but also a historian, painter, mechanic, mathematician, thinker and writer. The most famous Taishiling in the Tang Dynasty was Li who wrote TuiBei. He is the 1 person who graded the wind, improved the armillary sphere and promulgated the Linde calendar. Shen Kuo, the Northern Song Dynasty Taishi, is another all-rounder after Zhang Heng, who has profound attainments in geography, astronomy, water conservancy and physics.