A Text-Book of Astronomy

Fiction & Literature, Classics
Cover of the book A Text-Book of Astronomy by George C. Comstock, Gbooks
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Author: George C. Comstock ISBN: 1230002097428
Publisher: Gbooks Publication: January 16, 2018
Imprint: Language: English
Author: George C. Comstock
ISBN: 1230002097428
Publisher: Gbooks
Publication: January 16, 2018
Imprint:
Language: English

     4. The horizon—altitudes.—In their observations astronomers and sailors make much use of the plane of the horizon, and practically any flat and level surface, such as that of a smooth pond, may be regarded as a part of this plane and used as such. A very common observation relating to the plane of the horizon is called "taking the sun's altitude," and consists in measuring the angle between the sun's rays and the plane of the horizon upon which they fall.

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     4. The horizon—altitudes.—In their observations astronomers and sailors make much use of the plane of the horizon, and practically any flat and level surface, such as that of a smooth pond, may be regarded as a part of this plane and used as such. A very common observation relating to the plane of the horizon is called "taking the sun's altitude," and consists in measuring the angle between the sun's rays and the plane of the horizon upon which they fall.

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