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astrolabe

XDict

n. 古代的天体观测仪

PyDict

古代的天体观测仪

WordNet (r) 3.0 (2006) (WordNet)

astrolabe
n 1: an early form of sextant

The Collaborative International Dictionary of English v.0.48 (gcide)

Astrolabe \As"tro*labe\ ([a^]s"tr[-o]*l[=a]b), n. [OE.
astrolabie, astrilabe, OF. astrelabe, F. astrolabe, LL.
astrolabium, fr. Gr. 'astrola`bon; 'a`stron star ?, ?, to
take.]
1. (Astron.) An instrument for observing or showing the
positions of the stars. It is now disused.
[1913 Webster]

Note: 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 It is now superseded by the quadrant and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.
[1913 Webster]

2. A stereographic projection of the sphere on the plane of a
great circle, as the equator, or a meridian; a
planisphere. --Whewell.
[1913 Webster]

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Astrolabe	查看　Astrolabe　在百度字典中的解释	百度英翻中〔查看〕
Astrolabe	查看　Astrolabe　在Google字典中的解释	Google英翻中〔查看〕
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英文字典中文字典相关资料:

Astrolabe - Wikipedia
The astrolabe, which is a precursor to the sextant, [1] is effective for determining latitude on land or calm seas Although it is less reliable on the heaving deck of a ship in rough seas, the mariner's astrolabe was developed to solve that problem
ASTROLABE: Free Natal Chart Horoscope
Astrology: Free Natal Chart (Horoscope) from Astrolabe, the leader in automated birth chart reports, relationship reports, and transit and progressed horoscope reports The largest publisher of Computer Astrology titles related to Astrology and Horoscopes
Astrolabe | Definition, History, Facts | Britannica
astrolabe, any of a type of early scientific instrument used for reckoning time and for observational purposes One widely employed variety, the planispheric astrolabe, enabled astronomers to calculate the position of the Sun and prominent stars with respect to both the horizon and the meridian
Astrolabe - World History Encyclopedia
The astrolabe is an astronomical instrument used from around the 6th century to measure time and position by determining the altitude of heavenly bodies like the Sun and certain stars Measurements
ASTROLABE: Astrology Software, Reports, Books and Services
Astrolabe Inc, the world's largest publisher of astrology software, including the best-selling program Solar Fire<sup>TM< sup>
ASTROLABE Definition Meaning - Merriam-Webster
The meaning of ASTROLABE is a compact instrument used to observe and calculate the position of celestial bodies before the invention of the sextant The <span class
A beginners guide to the astrolabe - BBC Sky at Night Magazine
A guide to astrolabes, what they are, how to use them, and the best models available to buy online
Microsoft Word - Astrolabe_the_Missing_Manual. doc
The astrolabe is based on what is known as the planispheric projection In a planispheric projection, a spherical object is projected onto a plane surface by placing the origin of the projection at one pole of the sphere and projecting the points of the sphere onto a plane surface placed through its equator
Astrolabe - Simple English Wikipedia, the free encyclopedia
Astrolabe An astrolabe from the 16th century The astrolabe is a tool using the positions of the stars or sun It was formerly used in navigation to help explorers and sailors figure out where they were They found their distance north and south of the equator by measuring the distance of the sun and stars above the horizon
The Astrolabe Project - An obsession in progress
In researching the astrolabe and related tools, geometric construction comes up regularly I find the process of using a straight edge and compass to create accurate designs to be fascinating in and of itself One of my ongoing projects is drafting an astrolabe using just those tools

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