Descriptive Astronomy An Elem

Author : Herbert Alonzo Howe
Publisher : Forgotten Books
ISBN 13 : 9781331127482
Total Pages : 358 pages
Book Rating : 4.1/5 (274 download)

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Download or read book Elements of Descriptive Astronomy written by Herbert Alonzo Howe and published by Forgotten Books. This book was released on 2015-06-24 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Elements of Descriptive Astronomy: A Text-Book This book is intended for the use of students who have a fair knowledge of elementary algebra and plane geometry, and is the outcome of several years of experience with classes of this sort. The author hopes that the volume will also be acceptable to more advanced scholars. The teacher may here be reminded of the fact that among the most urgent needs in the study of astronomy is the exercise of the geometric imagination; that is, the faculty which forms mental pictures of the relative positions of planes and circles, and of the motions, real and apparent, of the celestial bodies. The initial step in astronomical instruction is to teach pupils the use of their eyes, - to insist that they observe the heavens and watch the celestial motions. Though they may be bewildered by such work at first, they will soon learn to delight in it, and will derive much profit from it. The earliest work in the line of observation is the study of the constellations. Acquaintance with the principal stars of the chief constellations visible in his latitude will prove a source of lifelong enjoyment to the pupil. Each student should keep a small blank book in which to make sketches, and to record the results of observations. The Star Maps, at the end of the volume, are on a generous scale, and include all stars not fainter than the fifth magnitude, from the north pole to 40o of south declination. By the use of these maps and star groups drawn on the blackboard, the teacher may greatly aid his pupils, who should copy the pictures and then find the corresponding objects in the sky. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.