1) An early form of sextant 2) Analog computer 3) French word used in English 4) Greek invention 5) Mechanical calculator 6) Old navigation instrument 7) Old navigational instrument 8) Predecessor of the sextant 9) Sextant
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https://www.crosswordclues.com/clue/astrolabe
{citation style|date=July 2013} An astrolabe (ἀστρολάβος astrolabos, `star-taker`) is an elaborate inclinometer, historically used by astronomers, navigators, and astrologers. Its many uses include locating and predicting the positions of the Sun, Moon, planets, and stars, determining local time given local latitude and vice-versa, su.....
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http://en.wikipedia.org/wiki/Astrolabe
• (n.) A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere. • (n.) An instrument for observing or showing the positions of the stars. It is now disused.
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http://thinkexist.com/dictionary/meaning/astrolabe/
Instrument used for celestial navigation. A large collection (more than 10) is displayed at the Museu de Marinha in Lisbon. Photo of astrolabe from the Batavia, courtesy Western Australia Maritime Museum. Illustration of usage.
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http://www.abc.se/~pa/uwa/glossary.htm
(from the article `La Pérouse, Jean-François de Galaup, Count de`) Commanding the ship La Boussole, which was accompanied by the Astrolabe, La Pérouse sailed from France on Aug. 1, 1785. After rounding Cape Horn, one ...
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http://www.britannica.com/eb/a-z/a/116
any of a type of early scientific instrument used for reckoning time and for observational purposes. One widely employed variety, the planispheric ... [6 related articles]
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http://www.britannica.com/eb/a-z/a/116
An Arabic and medieval European sighting instrument on an altazimuth mounting, used to determine the elevation above the horizon of celestial objects. It comprises two or more flat, metal, calibrated disks, attached so that both or all can rotate independently. For early navigators and astronomers i...
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http://www.daviddarling.info/encyclopedia/A/astrolabe.html
An ancient instrument used for measuring the altitudes of celestial objects.
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http://www.encyclo.co.uk/local/20448
1. <astronomy> An instrument for observing or showing the positions of the stars. It is now disused. ... Among the ancients, it was essentially the armillary sphere. A graduated circle with sights, for taking altitudes at sea, was called an astrolabe in the 18th century. It is now superseded by the quadrant and sextant. ... 2. A stereographic...
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http://www.encyclo.co.uk/local/20973
A circular instrument with a moveable arm for calculating the altitude of the sun and plotting the positions of the stars, for astronomical and navigational purposes. Astrolabes were used from the 2nd century, and although obsolete in Europe by the 18thC, forgeries continued to be made in the Middle East.
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http://www.encyclo.co.uk/visitor-contributions.php
As'tro·labe (ăs'tro*lāb)
noun [ Middle English
astrolabie ,
astrilabe , Old French
astrelabe , French
astrolabe , Late Latin
astrolabium , from Greek
'astrola`bon ;
'a`stron star + ..., ..., to take.]
1. (Astron.) A...
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http://www.encyclo.co.uk/webster/A/137
An astrolabe is an instrument used to make astronomical measurements, the term is now especially applied to an instrument used for measuring the altitudes of the stars. The Astrolabe was superseded by the quadrant and sextant. The name was also formerly given to an armillary sphere.
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http://www.probertencyclopaedia.com/browse/GA.HTM
[
n] - an early form of sextant
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http://www.webdictionary.co.uk/definition.php?query=astrolabe
An astrolabe is an instrument that was used to determine the altitude of objects in the sky (like the sun or stars). It was first used around 200 B.C. by astronomers in Greece. The astrolabe was replaced by the sextant. See also: Altitude.
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https://www.encyclo.co.uk/local/20687
noun an early form of sextant
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https://www.encyclo.co.uk/local/20974
Ancient navigational instrument, forerunner of the sextant. Astrolabes usually consisted of a flat disc with a sighting rod that could be pivoted to point at the Sun or bright stars. From the altitude of the Sun or star above the horizon, the local time could be estimated
Found on
https://www.encyclo.co.uk/local/21221
an astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sextant.
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https://www.infoplease.com/dictionary/astrolabe
an early form of sextant
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https://www.vocabulary.com/lists/724753
No exact match found.
