Jens Olsen’s World Clock’s_World_Clock
The clock consists of 12 movements which together have 15,448 parts.
Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time.
The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.
roughbarked said:
Jens Olsen’s World Clock’s_World_ClockThe clock consists of 12 movements which together have 15,448 parts.
Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time. The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.
I regret to inform them that the rate of precesion varies somewhat unpredictably over time.
dv said:
roughbarked said:
Jens Olsen’s World Clock’s_World_ClockThe clock consists of 12 movements which together have 15,448 parts.
Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time. The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.
I regret to inform them that the rate of precesion varies somewhat unpredictably over time.
This wasn’t known at the time.
roughbarked said:
dv said:
roughbarked said:
Jens Olsen’s World Clock’s_World_ClockThe clock consists of 12 movements which together have 15,448 parts.
Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time. The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.
I regret to inform them that the rate of precesion varies somewhat unpredictably over time.
This wasn’t known at the time.
The calculations for the clock were made up until 1928, after which they were supervised by the astronomer Elis Strömgren. The drawings for the clock were made between 1934 and 1936, and the actual production of the clock took place from 1943 until 1955. The clock was started on 15 December 1955 by King Frederik IX and Jens Olsen’s youngest grandchild Birgit.
The Jantar Mantar is a collection of 19 astronomical instruments built by the Rajput king Sawai Jai Singh, the founder of Jaipur, Rajasthan. The monument was completed in 1734. It features the world’s largest stone sundial, and is a UNESCO World Heritage Site. It is near City Palace and Hawa Mahal. The instruments allow the observation of astronomical positions with the naked eye. The observatory is an example of the Ptolemaic positional astronomy which was shared by many civilizations.
The monument features instruments operating in each of the three main classical celestial coordinate systems: the horizon-zenith local system, the equatorial system, and the ecliptic system. The Kanmala Yantraprakara is one that works in two systems and allows transformation of the coordinates directly from one system to the other. It has the biggest sundial in the world.
The monument was damaged in the 19th century. Early restoration work was undertaken under the supervision of Major Arthur Garrett, a keen amateur astronomer, during his appointment as Assistant State Engineer for the Jaipur District.
dv said:
roughbarked said:
Jens Olsen’s World Clock’s_World_ClockThe clock consists of 12 movements which together have 15,448 parts.
Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time. The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.
I regret to inform them that the rate of precesion varies somewhat unpredictably over time.
Chuck it in the dam.