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" Hipparchus, was an astrolabe for taking the distances in longitude between the sun and moon, or between the moon and a star. "
The Mechanics' Magazine, Museum, Register, Journal, and Gazette - Seite 13
1830
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Band 12

Perry Fairfax Nursey - 1830
...Sir, Your very obedient servant, A. MACKINHOK. Sheffield, August 3, 1829. NEW METHOD OF OBTAINING THE DISTANCE BETWEEN THE SUN AND MOON, OR BETWEEN THE MOON AND A STAR, IN ORDER TO FIND THE bONGITÜDE AT SEA. Sir, — Having been engaged for a series of years in teaching...
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Lunar and Horary Tables, for New and Concise Methods of Performing the ...

David Thomson - 1831 - 20 Seiten
...Chronometer by means of the Lunar Distances. RULE. 1. When there is a good opportunity for observing the distance between the Sun and Moon, or between the Moon and a Star, observe several sets of Distances with the Altitudes of the objects, and note the times by the Chronometer...
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An Historical Account of the Origin and Progress of Astronomy: With Plates ...

John Narrien - 1833 - 520 Seiten
...Ptolemy, and,- probably also, by Hipparchus, was an astrolabe for taking the distances in longitude between the sun and moon, or between the moon and a star. It consisted of two rings fixed at right angles to each other, one in the plane of the ecliptic and...
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An Historical Account of the Origin and Progress of Astronomy: With Plates ...

John Narrien - 1833 - 520 Seiten
...Ptolemy, and, probably also, by Hipparchus, was an astrolabe for taking the distances in longitude between the sun and moon, or between the moon and a star. It consisted of two rings fixed at right angles to each other, one in the plane of the ecliptic and...
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Memoirs of a Trait in the Character of George III. of These United Kingdoms ...

John Harrison - 1835 - 256 Seiten
...sea, could also, by observations, ascertain what is the apparent distance, at the place where he is, between the Sun and Moon, or between the Moon and a star, and likewise their respective altitudes ; and if he could also, at the same moment, ascertain the time...
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Iron: An Illustrated Weekly Journal for Iron and Steel ..., Band 43

Perry Fairfax Nursey - 1845
...and 180° being negative. The same formula, it is manifest, will apply to the determination of the distance between the sun and moon, or between the moon and a fixed star, when their right ascensions and declinations are known ; so that this problem, when taken...
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Practical Astronomy and Geodesy: Including the Projections of the Sphere and ...

John Narrien - 1845 - 427 Seiten
...the same instant, appear to occupy if it were observed at two different stations. The celestial arc between the sun and moon, or between the moon and a star, at any instant, will evidently subtend different angles at the eyes of two observers at different stations...
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Lunar and horary tables, for ... ascertaining the longitude

David Thomson (inventor of the longitude scale.) - 1845
...Chronometer by means of the Lunar Distances. RULE. 1. When there is a good opportunity for observing the distance between the Sun and Moon, or between the Moon, and a Planet, or a Star, observe several sets of distances with the Altitudes of the objects, and note the...
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Practical Geodesy: Comprising Chain Surveying, and the Use of Surveying ...

Sir J. Butler Williams - 1846 - 330 Seiten
...an 1 _. elevation of 18 feet . / True altitude of the sun's centre When a "lunar distance," ie, the distance between the sun and moon, or between the moon and a fixed star or planet, is required, the instrument is held in the plane passing through the eye and...
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A Treatise on Military Surveying: Including Sketching in the Field, Plan ...

Basil Jackson - 1847 - 344 Seiten
...minute of space in two minutes of time. Therefore, if we make an error of one minute in observing the distance between the sun and moon, or between the moon and a star, we make an error of two minutes in time, or thirty miles in longitude at the equator. By the effect...
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