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The Astrophysical Journal, Vol. 31: An International Review of Spectroscopy and Astronomical Physics; January June, 1910 (Classic Reprint)

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The Astrophysical Journal, Vol. 31

An International Review of Spectroscopy and Astronomical Physics; January June, 1910 (Classic Reprint)

By George E. Hale

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Format: Paperback, 510 pages
Published In: United States, 12 November 2016
Excerpt from The Astrophysical Journal, Vol. 31: An International Review of Spectroscopy and Astronomical Physics; January June, 1910 Brooks-swift Of Comet 1884 I, of r)1 Cassiopeiae and 8 Lyme. In the paper on the new star in the Andromeda nebula (astronomische N achrichten, I 12, 390, I88 5) he mentions his first experiments on the use Of photography for observations of nebulae, a method he had previously employed for the solar eclipse in I882. The interesting photograph of a meteor accidentally crossing the field Of his re ector during an exposure on some other Object, and forming a trail like a comet, was made in his earliest photographic researches. His first success in comet photography came in the autumn of 1886, when he Obtained a photograph of Comet 1886 IX. After the Observa tions on the spectrum of U Orionis, he published his first account of his most interesting photographs of nebulae, to which were devoted many years of his assiduous work, and increased a great deal our knowledge of the constitution of the nebulae. The discovery of the small star in the Lyra nebula was considered somewhat doubtful at first by several observers, but was universally recognized as certain after having been thoroughly verified by others. His first photographs Showed the great advantage of the new method over visual Observa tions, and on his photographs of comparatively small size von Gothard obtained delicate details which were lacking on the best drawings made with large instruments, or appeared there only as Slight traces. Professor Vogel in Potsdam examined very closely some of von Gothard's photographs, and requested Mr.' S. Widt to make elaborate drawings Of five nebulae, believing that only well-made drawings are able to Show all the fine details Of the originals (astronomische N achrichten, 119, 337, He emphasizes the fact that small condensations Of the nebulous matter can always be easily distin guished from star-images by examining carefully the silver deposit on the plate. He could make very exact measures of well-marked details on the photographs. The excellence of von Gothard's photographs can also be seen on his photographs Of the small nebula near and of the small nebula, M 57, discovered by Barnard; in this case he succeeded in verifying the existence of these very faint Objects with his comparatively small instrument, though only the Lick telescopes seemed to be large enough to Show them visually (astronomische N achrichten, I 35, 11, I894; Astronomy and Astrophysics, I3, 190. 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."
EAN: 9781334254031
ISBN: 1334254036
Publisher: Forgotten Books
Dimensions: 22.86 x 15.24 x 2.62 centimetres (0.68 kg)
Age Range: 15+ years
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