Bøger af Robert Main

A classic astronomy textbook from the 19th century, Main's work provides an overview of the solar system, the stars, and other celestial objects. The book also includes practical instructions for using telescopes and other astronomical instruments.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

""Practical and Spherical Astronomy: For the Use Chiefly of Students in the Universities"" is a book written by Robert Main in 1863. The book is a comprehensive guide to the study of astronomy, with a focus on practical and spherical astronomy. It is intended for use by students in universities who are studying astronomy. The book covers a wide range of topics, including the history of astronomy, the principles of celestial mechanics, the measurement of time, and the use of astronomical instruments. It also includes detailed explanations of the principles of spherical astronomy, which is the study of the positions and motions of celestial objects as seen from the surface of the Earth.The book is divided into several sections, each of which covers a specific aspect of astronomy. The first section provides an introduction to the subject, including a brief history of astronomy and an overview of the principles of celestial mechanics. The second section covers the measurement of time, including the use of clocks and the determination of the Earth's rotation.The third section of the book is devoted to the study of astronomical instruments, including telescopes, spectrometers, and photometers. The fourth section covers the principles of spherical astronomy, including the determination of the positions and motions of celestial objects as seen from the Earth.Throughout the book, Main provides clear and concise explanations of complex astronomical concepts, making it an ideal resource for students of astronomy. The book also includes numerous diagrams and illustrations to help readers understand the material.Overall, ""Practical and Spherical Astronomy: For the Use Chiefly of Students in the Universities"" is a valuable resource for anyone interested in the study of astronomy, from beginners to advanced students.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.