Editing Astronomical clock (section)

== Interior clocks and watches ==
=== The Rasmus Sørnes Clock ===
[[File:RasmusSornesClock.jpg|thumb|upright=1.1|The [[Rasmus Sørnes]] Clock.]]

Arguably the most complicated of its kind ever constructed, the last of a total of four astronomical clocks designed and made by Norwegian [[Rasmus Sørnes]] (1893–1967), is characterized by its superior complexity compactly housed in a casing with the modest measurements of 0.70 x 0.60 x 2.10 m. Features include locations of the sun and moon in the zodiac, [[Julian calendar]], [[Gregorian calendar]], [[sidereal time]], GMT, local time with daylight saving time and leap year, solar and lunar cycle corrections, eclipses, local sunset and sunrise, moon phase, tides, [[sunspot]] cycles and a [[planetarium]] including [[Pluto]]'s 248-year orbit and the 25 800-year periods of the polar ecliptics ([[precession]] of the Earth's axis). All wheels are in brass and gold-plated. Dials are silver-plated. The clock has an electromechanical pendulum.

Sørnes also made the necessary tools and based his work on his own astronomical observations. Having been exhibited at the Time Museum in Rockford, Illinois (since closed), and at the [[Chicago Museum of Science and Industry]], the clock was sold in 2002 and its current location is not known. The Rasmus Sørnes Astronomical Clock No. 3, the precursor to the Chicago Clock, his tools, patents, drawings, telescope, and other items, are exhibited at the [[Borgarsyssel Museum]] in [[Sarpsborg]], Norway.

=== Table clocks ===
There are many examples of astronomical table clocks, due to their popularity as showpieces. To become a master clockmaker in 17th-century [[Augsburg]], candidates had to design and build a 'masterpiece' clock, an astronomical table-top clock of formidable complexity. Examples can be found in museums, such as London's [[British Museum]].

Currently Edmund Scientific among other retailers offers a mechanical Tellurium clock, perhaps the first mechanical astronomical clock to be mass-marketed.

In Japan, [[Tanaka Hisashige]] made a [[Myriad year clock]] in 1851.

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=== Watches ===
<!--Blatant unencyclopedic self-publicity-->
More recently, independent clockmaker {{Interlanguage link|Christiaan van der Klaauw|nl}} created a wristwatch astrolabe, the "Astrolabium" in addition to the "Planetarium 2000", the "Eclipse 2001" and the "Real Moon." [[Ulysse Nardin]] also sells several astronomical wristwatches, the "Astrolabium," "Planetarium", and the "Tellurium J. Kepler."
<gallery mode="packed" heights="200px" style="text-align:left">
File:planetarium 2000.jpg|''{{Interlanguage link|Christiaan van der Klaauw|nl}}<br>Planetarium 2000''
File:Ulysse-Nardin MG 2565.jpg|[[Ulysse Nardin]] ''Astrolabium Galileo Galilei''
File:Cosmosign.jpg|''Citizen Cosmosign''
File:Moonsign.JPG|''Citizen Moonsign''
</gallery>

=== Other examples ===
Two of [[Holland America]]'s cruise ships, the ''MS Rotterdam'' and the ''MS Amsterdam'', both have large astronomical clocks as their main centerpieces inside the ships' atriums.