A Selection Of Photographs Of Stars Star Clusters And Nebulae PDF Download

Excerpt from A Selection of Photographs of Stars, Star-Clusters and Nebulae, Vol. 2: Together With Records of Results Obtained in the Pursuit of Celestial Photography My intention, in the pages following, is to convey in brief, and I hope clear form, my views concerning some of the results already obtained by the aid of photography in the elucidation of celestial problems, the complete solution of which cannot for many years yet be obtained; and I may here quote from the preface to the volume, issued in the year 1893, of A Selection of Photographs of Stars, Star-Clusters, and Nebul, the following paragraphs, which are applicable also to the present volume. "It has been my aim, in publishing the photographs and descriptive matter introduced in the following pages, to place data in the hands of astronomers, for the study of astronomical phenomena, which have been obtained by the aid of mechanical, manipulative, and chemical processes of the highest order at present attainable; and that such data should be, as regards the photographs, free from all personal errors." "The photographs portray portions of the Starry Heavens in a form at ll times available for study, and identically as they appear to an observer aided by a powerful telescope and clear sky for observing." In the processes employed for obtaining the photographic illustrations contained in this volume the same instruments have been used, and the same care has been exercised in the production of the illustrations of the various objects as in the first volume; but owing to improvements in the manufacture of photographic films, and to the extended data now available beyond that which had been obtained up to the year 1893, when the first volume was published, certain deductions concerning the evolution of stellar systems are now permissible which six years ago would have been justly considered premature. The evidence now published appears to me of so striking a character that it should no longer be withheld from discussion. In presenting it I have endeavoured to avoid personal predilections or bias of any kind, and would only ask for the same fairness in any criticism to which my views may be submitted. 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."