T�tulo: A Manual of Spherical and Practical Astronomy, Vol 2 Embracing the General Problems of Spherical Astronomy, the Special Applications to Nautical Instruments Theory and Use of Astronom
Editor: Forgotten Books
Fecha de publicaci�n: 2019
Idioma: Ingl�s
ISBN 10: 0365316229
ISBN 13: 9780365316220
Encuadernaci�n: HRD
Estado: New
Peso: 1103 gramos

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Sinopsis

Excerpt from A Manual of Spherical and Practical Astronomy, Vol. 2: Embracing the General Problems of Spherical Astronomy, the Special Applications to Nautical Astronomy, and the Theory and Use of Fixed and Portable Astronomical Instruments; Theory and Use of Astronomical Instruments; Method of Least Squares

The line of sight is he straight line drawn from the thread through the optical centre of the objective; for this line repro sents the direction of a,distant point (as a star), when the tele scope is so directed that an image of the point is formed at the thread. This line is also called the line of collimation; but we shall hereafter, for the sake of brevity, call it the sight-zine.

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