Jens Olsen's World Clock
Jens Olsen's World Clock or Verdensur is an advanced astronomical clock which is displayed in Copenhagen City Hall.[1][2]
The clock was designed and calculated by
The clock consists of 12 movements which together have 15,448 parts.[4][5] The clock is mechanical and must be wound once a week.[6] Displays include lunar and solar eclipses, positions of the stellar bodies, and a perpetual calendar, in addition to the time.[1] The fastest gear completes a revolution every ten seconds and the slowest every 25,753 years.[1][5]
The calculations for the clock were made up until 1928, after which they were supervised by the astronomer Elis Strömgren.[5] The drawings for the clock were made between 1934 and 1936,[7] and the actual production of the clock took place from 1943 until 1955.[8] The clock was started on 15 December 1955 by King Frederik IX and Jens Olsen's youngest grandchild Birgit.[1][7]
See also
Further reading
- Otto Mortensen Jens Olsen's Clock: A Technical Description Technological Institute, Copenhagen, 1957.
References
- ^ a b c d Welin, Charlotte (15 December 2005). "Det kan gå i 520.000 år endnu". Berlingske (in Danish). Retrieved 1 October 2016.
- ^ "Jens Olsen's World Clock". Museum of Copenhagen. Archived from the original on 28 October 2020. Retrieved 1 October 2016.
- Den Store Danske. Gyldendal. Retrieved 1 October 2016.
- ^ "The Story of The Astronomical Clock". ateliera.dk. Retrieved 1 October 2016.
- ^ a b c "Astromekaniker Jens Olsen" (in Danish). kagaard.dk. Retrieved 1 October 2016.
- ^ Pedersen, Marie Carsten (19 November 2013). "Smuk guide åbner verdensurets univers". Politiken. Retrieved 1 October 2016.
- ^ Dagbladet Arbejderen. 15 December 2011. Archived from the originalon 20 August 2017. Retrieved 1 October 2016.
- Den Store Danske. Gyldendal. Retrieved 1 October 2016.
External links
- The Story of the Astronomical Clock
- Description of Jens Olsen's World Clock Archive.org (Danish)