The Elements of Astronomy Principally On the Mechanical Side, Intended for Engineering Students
The book The Elements of Astronomy Principally On the Mechanical Side, Intended for Engineering Students was written by author N F Nathan Fellowes Dupuis Here you can read free online of The Elements of Astronomy Principally On the Mechanical Side, Intended for Engineering Students book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Elements of Astronomy Principally On the Mechanical Side, Intended for Engineering Students a good or bad book?
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As the pole changes place, so the circle of perpetual appari- tion must change its centre and the groups of stars which it includes. Similar changes occur in the circle of perpetual occultation. 47. Causes of Precession. We may say, in the beginning, that a perfectly spherical earth would have no precession. So that the remote cause of the precession is the earth's axial rotation, which causes the earth to become protuberant at the equator; and it is this protuberant mass which gives rise to th...e precession. A rigid discussion of the reason for the precession cannot be given without the use of mathematics far beyond the scope of this work. But we can get a reasonable and in- structive illustration of the matter which may, to some extent, take the place of demonstration, by experiments upon the behaviour of certain bodies in motion. The really difficult part, however, of the problem is as to why the bodies in the experiment do as they do. A is a top supposed to be rapidly spinning in the direction of the arrow, and to be in a position of equilibrium, with its axis vertical and at rest.
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