It would take 12 years to put together the 15,448 individual parts. However ... In Strasbourg, the young locksmith saw an astronomical clock with a perpetual calendar in a cathedral.

[Mark] describes the clock as “a four train, quarter striking movement with the fourth train driving the astronomical systems ... construction for the better part of two decades, and we ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Astronomical clock, made by Samuel Watson, London, about 1695. in ebonised case with one cranked winding key and two door keys. Astronomical clock, made by Samuel Watson, London, about 1695. in ...

Each observatory is furnished with an astronomical clock, a recording register and a transit instrument. A galvanic current is constantly passing through each clock from a battery outside ...

This remarkable astronomical clock is one of only two known examples ... but it is based on an English design of around AD 1790. Parts of the movement, such as the short pendulum are unusual ...

Located in the Old Town Square, the Prague Astronomical Clock has been around since the 15th century, though it has required repairs many times over its history. This clock doesn't display the ...