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" Circles are great circles which pass through the zenith and nadir, and cut the horizon at right angles. "
A Synopsis of Practical Mathematics: Containing Plain Trigonometry ... - Σελίδα 177
των Alexander Ewing - 1779 - 266 σελίδες
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A Synopsis of Practical Mathematics: Containing Plain Trigonometry ...

Alexander Ewing - 1771 - 342 σελίδες
...weft and fouth. The fame is true of the moon or any ftar. . 35. Vertical or azimyth circles ZmNand ZvN pafs through the zenith and nadir, and cut the horizon...the north and fouth points ; and the prime vertical crofies the meridian at right angles in the zenith, and cutwh^e horizon in the eaft and weft points....

Elements of Geography: Designed for Young Students in that Science. In Seven ...

Benjamin Workman - 1809 - 218 σελίδες
...is the sun's or a star's distance, in degrees, from the zenith. Azimuth, or vertical circles, pass through the zenith and nadir, and cut the horizon at right angles. Azimuth is the point of the coinpass the sun or stars bears on ; or it is the (GEOGRAPHY. 41 umber...

Astronomy, as it is Known at the Present Day: With an Account of the Nature ...

George G. Carey - 1825 - 274 σελίδες
...when placed at any point of the earth's surface. 23. Efertica^JCiicles are great circles which pass through the zenith and nadir, and cut the horizon at right angles. 24. Tbe^MitudejsLs^Celeatiit] i JBody is its height above the horizon, reckoned on the vertical circle...

A Manual of Astronomy and the Use of the Globes ...

Henry Kiddle - 1854 - 154 σελίδες
...of the horizon are the North, East, South, and West. Vertical circles are great circles which pass through the zenith and nadir, and cut the horizon at right angles. The Prime Vertical is that vertical circle which passes through the east and west points of the horizon....

The Civil-engineer & Surveyor's Manual

Michael McDermott - 1879 - 540 σελίδες
...the complement of the altitude, or the altitude taken from 90°. Azimuth or Vertical Circles, pass through the zenith and nadir, and cut the horizon at right angles. r :*- «»- * or Ataato, of a celestial object is that at whiM, a ceesa oect is that at whiM, °r ut...

Taylor's Modern Navigation

Henry Taylor - 1904 - 412 σελίδες
...vertices of the great circle. ME, C, M E. Q. 3 — What are vertical circles? Circles whose planes pass through the zenith and nadir and cut the horizon at right angles. See Fig. 2. C, observer ; X, horizon ; Z, zenith; N, nadir; ZXN, vertical circle. Pig.Z VERTICAL CIRCLES...

Wrinkles in Practical Navigation

Squire Thornton Stratford Lecky - 1918 - 966 σελίδες
...cousins ; though their names are different they are strictly of the same family. They one and all pass through the zenith and nadir, and cut the horizon at right angles ; they therefore belong to the Great Circle clan, members of which, like Scotchmen, are to be found...

The Astro-meteoric Journal

1867 - 566 σελίδες
...when placed at any point of the earth's surface. 23. Vertical Circles are great circles which pass through the zenith and nadir, and cut the horizon at right angles. 24. The Altitude of a Celestial Body is its height above the horizon, reckoned on the vertical circle...

The Welcome hour, Τόμος 10

1886 - 202 σελίδες
...zenith are the north, east, south and west. Also that vertical circles are great circles which pass through the zenith and nadir, and cut the horizon at right angles. The prime vertical, too, is that vertical circle which passes through the east and west points of the...




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