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The book included 47 different illustrations of great detail of the mechanical workings for his astronomical clock tower. [40] Su Song's greatest project was the 40-foot-tall water-powered astronomical clock tower constructed in Kaifeng, the wooden pilot model completed in 1088, the bronze components cast by 1090, while the wholly finished work ...
The Prague astronomical clock or Prague Orloj (Czech: Pražský orloj [praʃskiː orloj]) is a medieval astronomical clock attached to the Old Town Hall in Prague, the capital of the Czech Republic. The clock was first installed in 1410, making it the third-oldest astronomical clock in the world and the oldest clock still in operation. [1] [2]
The astronomical clock in the tower of the New Town Hall was installed in 1910. Kryštofovo Údolí. The Kryštofovo Údolí astronomical clock is a modern astronomical clock (inaugurated in 2008), built-in a former electrical substation. Hojsova Stráž. An astronomical clock in the Bohemian Forest was inaugurated in 2017. It has a concentric ...
Prague Orloj is a medieval astronomical clock mounted on the Old Town Hall. The clock was first installed in 1410, making it the third-oldest astronomical clock in the world and the oldest one still in operation. The tower of the Old Town Hall is open to the public and offers panoramic views of the Old Town.
In 976, the Song dynasty astronomer Zhang Sixun addressed the problem of the water in clepsydrae freezing in cold weather when he replaced the water with liquid mercury. [32] A water-powered astronomical clock tower was built by the polymath Su Song in 1088, [33] which featured the first known endless power-transmitting chain drive. [34]
The later Song dynasty historical text of the Song Shi (compiled in 1345 AD) records Zhang's work (Wade-Giles spelling): . At the beginning of the Thai-Phing Hsing-Kuo reign-period (+976) the Szechuanese Chang Ssu-Hsun [Zhang Sixun], a student in the Bureau of Astronomy, invented an astronomical clock (lit. armillary sphere, hun i) and presented the designs to the emperor Thai Tsung, who ...
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The Chinese title Huntian hunjun「渾天昏君」is an untranslatable pun on huntian (渾天) meaning "astronomical clock", and hunjun (昏君) meaning "foolish ruler". According to the composer, the first 'clock' is the water-powered astronomical clock-tower built by the court official Su Song (蘇頌) in Kaifeng during the Northern Song dynasty.