Inhaltsangabe
Excerpt from Elements of Descriptive Astronomy: A Text-Book
The purely descriptive matter about the sun, moon, planets, etc., has been kept quite free from such statistics as the values Of the masses of the planets, and the intensity of the pull of gravitation at the surface Of each. The student should, however, learn the distance, diameter, time of revolution, and time of rotation of each planet. More extended data for purposes Of reference are to be found in the Appendices.
In this edition the results of the latest important investigations and discoveries have been stated. The work Of the Lick Observa tory, as set forth in the publications of the Astronomical Society Of the Pacific, merits and has received much attention. The columns of astronomical periodicals have furnished a large amount Of reliable information.' The author will welcome for a second edition any suggestions or corrections.
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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.
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Reseña del editor
Excerpt from Elements of Descriptive Astronomy: A Text-Book
The purely descriptive matter about the sun, moon, planets, etc., has been kept quite free from such statistics as the values Of the masses of the planets, and the intensity of the pull of gravitation at the surface Of each. The student should, however, learn the distance, diameter, time of revolution, and time of rotation of each planet. More extended data for purposes Of reference are to be found in the Appendices.
In this edition the results of the latest important investigations and discoveries have been stated. The work Of the Lick Observa tory, as set forth in the publications of the Astronomical Society Of the Pacific, merits and has received much attention. The columns of astronomical periodicals have furnished a large amount Of reliable information.' The author will welcome for a second edition any suggestions or corrections.
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.
Reseña del editor
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.
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