A System of Astronomy On the Principles of Copernicus
The book A System of Astronomy On the Principles of Copernicus was written by author John Vose Here you can read free online of A System of Astronomy On the Principles of Copernicus book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A System of Astronomy On the Principles of Copernicus a good or bad book?
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Add these altitudes, and half their sura is the altitude of the pole, and, of course, the lati- tude of the place. The pole star is of the same altitude of the pole, when at its greatest elongation from the pole, east or west. To obtain the greatest elongation, observe that the star Alioth of the constellation Ursa Major, or the Great Bear, the pole star, and the star Gamma of Cassiopeia, are nearly in a Jine. -r- When this line is in a horizontal direction, or perpendicular to the plane of the... meridian, the pole star is at its greatest elongation, east or west, being on the side of the pole next to the Gamma of Cassiopeia and opposite to Alioth. Hence it is east, when Alioth is west, and it is west when Alioth is east. *The student's judgment, with a little attention, will easily determine, whether in the zenith distance and declination he ought to add or subtract. LONGITUDE. 177 For practical methods of obtaining the latitude of places, see Dr. Bowditch's standard work, " The new American Practical Navigator.
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