Star clock

Star clock

A star clock is a method of using the stars to determine the time. Some methods require no tools; others use an astrolabe and a planisphere.

A clock's regulator can be adjusted so that it keeps the Mean Sidereal Time rate. When it is then set to an observer's Local Mean Sidereal Time then a star will transit the meridian (passing directly north or south) at the sidereal time of the star's Right Ascension.

ee also

* Sidereal time

External links

* [http://www.johnpratt.com/items/astronomy/telltime.html Telling Time by Sun and Stars] by John P. Pratt
* [http://www.inquiry.net/outdoor/night/telling_time.htm Inquiry.net]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Clock — For other uses, see Clock (disambiguation). Timepiece redirects here. For the Kenny Rogers album, see Timepiece (album). Platform clock at King s Cross railway station, London …   Wikipedia

  • Star catalogue — An illustration of the Perseus constellation (after Perseus from Greek mythology) from the star catalogue published by the German astronomer Johannes Hevelius in 1690 A star catalogue, or star catalog, is an astronomical catalogue that lists… …   Wikipedia

  • Clock King — Publication information Publisher DC Comics First appearance (Tockman) World s Finest Comics #111 (August 1960) (Tem) Teen Titans #57 …   Wikipedia

  • Star Trek VI: The Undiscovered Country — Theatrical release poster by John Alvin Directed by Nicholas Meyer …   Wikipedia

  • Clock Tower (video game) — Clock Tower Japanese cover art Developer(s) Human Entertainment Publisher(s) H …   Wikipedia

  • Clock Tower (series) — Clock Tower is a stealth based survival horror adventure video game series,[1] created by Human Entertainment and continued by Sunsoft. The series plays like a horror film and unlike some of the other survival horror games, the Clock Tower series …   Wikipedia

  • Clock Tower, Brighton — Clock Tower The tower from the southwest Location: North Street, Brighton, Brighton and Hove …   Wikipedia

  • Star chart — Star map redirects here. For other uses, see Star map (disambiguation). A celestial map from the 17th century, by the Dutch cartographer Frederik de Wit A star chart is a map of the night sky. Astronomers divide these into grids to use them more… …   Wikipedia

  • Star Trek : La serie animee — Star Trek : La série animée Star Trek : La série animée Logo de Star Trek La série animée Titre original Star Trek: The Animated Series Genre Série d animation, de science fiction Pays d’origine …   Wikipédia en Français

  • Star Trek : La série animée — Star Trek : La série animée Logo de Star Trek La série animée Titre original Star Trek: The Animated Series Genre Série d animation, de science fiction Pays d’origine …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”