Download or read book Researches on Astronomical Spectrum Photography Classic Reprint written by Henry Draper and published by Forgotten Books. This book was released on 2017-07-27 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Researches on Astronomical Spectrum-Photography As will be easily understood, these Operations upon stellar spectra were by no means carried on continuously. But only during Dr. Draper's summer residence at his country place, and in the intervals of other. 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.
Download or read book The Astrophysical Journal Vol 31 written by George E. Hale and published by Forgotten Books. This book was released on 2018-02-28 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Astrophysical Journal, Vol. 31: An International Review of Spectroscopy and Astronomical Physics; January June, 1910 Brooks-swift Of Comet is84'i, of y Cassiopeiae and B Lyme. In the paper on the new star in the Andromeda nebula (astronomische N achrichten, I 12, 390, 1885) 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 1882. The interesting photograph of a meteor accidentally crossing the field Of his reflector 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 aohriokten, 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 rda-349980 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 aokrichten, 135, II, 1894; 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.
Download or read book Publications of the Astronomical Society of the Pacific Vol 6 Classic Reprint written by Astronomical Society of the Pacific and published by Forgotten Books. This book was released on 2017-05-26 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Publications of the Astronomical Society of the Pacific, Vol. 6 It is certain that a photograph, properly taken, will Show many features of comets, nebulae and the Milky Way which the eye cannot grasp as well, or even at all. Thus the photo graphic Milky Way must always be different from the visual one, and future researches may well be directed solely to the former. The recent photographs of Comet Swift (april, of Comet b (july, 1893) and of Comet Brooks (october, 1893) taken at the lick Observatory, by Professors barnard and hussey, exhibit several features in the fainter portions of these comets which are not visible to the eye and which have not been seen in earlier comets. Yet it is very possible, and even probable, that these features may have been present in former bright comets. For the tails of comets, then, we shall always prefer photographs to drawings. The case is entirely the same for nebulae. Why should it be different for the Milky Way? Photographs of the Milky Way do, in fact, Show some features which the eye cannot see at all (and hence duplicate negatives should be taken for verification) and they Show very many others which the eye sees, indeed, but not with sufficient sharpness to allow of a satisfactory delineation. The photograph has, however, errors of its own which are of the same general nature as the errors of the human retina and it takes account of one part of the spectrum only.* A considerable part of the luminous background of the Milky Way, as seen with the naked eye, is due to the fact that the eye cannot separate the different stars which really exist in the sky and whose images, therefore, overlap on the retina. Moreover, the eye cannot be rigidly fixed on one area, but leaves it and returns to it continuously; and hence the persistence of vision contributes also to the formation of the luminous back ground which we (apparently) see. A considerable part of this background has, therefore, no real existence, but is a strictly subjective appearance, and must, consequently, be different to different eyes. When a telescope is employed to view the Milky Way, phenomena of the same general nature occur. A telescope has a greater separating power than the eye, and more stars are separately seen; but those which are not individually shown produce the effects just described. The larger the telescope the greater the separating power and the larger the number of stars which form their individual images, and the fewer stars, therefore. 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.
Download or read book Researches in Physical Optics Vol 2 written by Robert Williams Wood and published by Forgotten Books. This book was released on 2018-03-20 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Researches in Physical Optics, Vol. 2: Resonance Radiation and Resonance Spectra HE researches described in the following pages were made by Professor Wood, in several cases together with collaborators, while he was Ernest Kempton Adams Fellow of Columbia University in 1912 - 1914, and subsequently. In this work, Part II of these Researches in Physical Optics, the important field of investigation opened by the author has been developed in the direction of more detailed study of resonance radiation and resonance spectra. 0 Publication has been delayed from time to time, in order to include new material and, more recently, on account of conditions arising from the war. In the absence in Europe of the author as the volume goes to press, the editors of the series venture to express for the author his-obligation and thanks to his several collaborators and to all who have assisted in his work. To the Astrophysical Journal thanks are due for cuts used in illustrating the fifth paper. 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.
Download or read book Spectral Photometric Studies Classic Reprint written by Daniel William Murphy and published by Forgotten Books. This book was released on 2018-02-06 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Spectral Photometric Studies The question which we are then called upon to solve is, does the doubling of the amount of light in this manner double the intensity of every part of the spectrum? Let us imagine, first, an infinitely narrow slit; the spectrum from such a source may be called a pure spectrum, since any point in it will contain light of but one wave-length. If this slit be moved in a direction perpendicular to the edge of the prism the spectrum will travel in the same direction; and a stationary point, as the light traveled over it, would be illuminated by light of different colors. Next, let us consider a wide slit, and think of its being divided into infinitely narrow ones; we recognize that every part of the spectrum from such a source will consist of lights of different wave-lengths superposed upon each other. Such a spectrum we will call an impure one, and it is with such that we are required to deal in practical measurements. 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.
Download or read book Cantor Lectures on Photography and the Spectroscope Classic Reprint written by William De Wiveleslie Abney and published by Forgotten Books. This book was released on 2018-01-05 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Cantor Lectures on Photography and the Spectroscope It often happens that a second patch of white light, comparable to that formed, is te quired. Advantage is taken of the fact that from the first surface of the first prism P', a certain amount of light is reflected. Placing a lens. L5, in the path of this reflected beam, and a mirror, G, another square patch of light can be thrown on the same screen as that on which the first is thrown, and this second patch may be made of the same size as the first patch if the lens, L5, be of suitable focus, and it can be superposed over the first patch if required. We have now a square white patch upon the screen, from the te-combination of the spectrum. If I wish to diminish the bright ness of this patch, there are at least two ways in Which I can accomplish it. First, by closing the slit of the collimator, and, second, by the introduction of rotating sectors, M, which can be Opened and closed at pleasure during rotation in the path of the beam. 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.
Download or read book Reprints National Radio Astronomy Observatory Green Bank W Va written by National Radio Astronomy Observatory (U.S.) and published by . This book was released on 1973 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopy for Amateur Astronomers written by Marc F. M. Trypsteen and published by Cambridge University Press. This book was released on 2017-07-20 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This accessible guide presents the astrophysical concepts behind astronomical spectroscopy, covering both theoretical and practical elements. Suitable for anyone with only a little background knowledge and access to amateur-level equipment, it will help you understand and practise the scientifically important and growing field of amateur astronomy.
Download or read book Mapping the Spectrum written by Klaus Hentschel and published by . This book was released on 2002 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the boom of spectrum analysis in the 1860s, spectroscopy has become one of the most fruitful research technologies in analytic chemistry, physics, astronomy, and other sciences. This book is the first in-depth study of the ways in which various types of spectra, especially the sun's Fraunhofer lines, have been recorded, displayed, and interpreted. The book assesses the virtues and pitfalls of various types of depictions, including hand sketches, woodcuts, engravings, lithographs and, from the late 1870s onwards, photomechanical reproductions. The material of a 19th-century engraver or lithographer, the daily research practice of a spectroscopist in the laboratory, or a student's use of spectrum posters in the classroom, all are looked at and documented here. For pioneers of photography such as John Herschel or Hermann Wilhelm Vogel, the spectrum even served as a prime test object for gauging the color sensitivity of their processes. This is a broad, contextual portrayal of the visual culture of spectroscopy in the 19th and early 20th centuries. The illustrations are not confined to spectra--they show instruments, laboratories, people at work, and plates of printing manuals. The result is a multifacetted description, focusing on the period from Fraunhofer up to the beginning of Bohr's quantum theory. A great deal of new and fascinating material from two dozen archives has been included. A must for anyone interested in the history of modern science or in research practice using visual representations.
Download or read book Patrick Moore s Data Book of Astronomy written by Patrick Moore and published by Cambridge University Press. This book was released on 2014-01-16 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Packed with up-to-date astronomical data about the Solar System, our Galaxy and the wider Universe, this is a one-stop reference for astronomers of all levels. It gives the names, positions, sizes and other key facts of all the planets and their satellites; discusses the Sun in depth, from sunspots to solar eclipses; lists the dates for cometary returns, close-approach asteroids, and significant meteor showers; and includes 88 star charts, with the names, positions, magnitudes and spectra of the stars, along with key data on nebulae and clusters. Full of facts and figures, this is the only book you need to look up data about astronomy. It is destined to become the standard reference for everyone interested in astronomy.
Download or read book Reprints written by Harvard College Observatory and published by . This book was released on 1955 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Astronomy A Physical Perspective written by Marc Leslie Kutner and published by Cambridge University Press. This book was released on 2003-07-31 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fully revised and updated text is a comprehensive introduction to astronomical objects and phenomena. By applying some basic physical principles to a variety of situations, students will learn how to relate everyday physics to the astronomical world. Starting with the simplest objects, the text contains explanations of how and why astronomical phenomena occur, and how astronomers collect and interpret information about stars, galaxies and the solar system. The text looks at the properties of stars, star formation and evolution; neutron stars and black holes; the nature of galaxies; and the structure of the universe. It examines the past, present and future states of the universe; and final chapters use the concepts that have been developed to study the solar system, its formation; the possibility of finding other planetary systems; and the search for extraterrestrial life. This comprehensive text contains useful equations, chapter summaries, worked examples and end-of-chapter problem sets.
Download or read book A New Science Strategy for Space Astronomy and Astrophysics written by National Research Council and published by National Academies Press. This book was released on 1997-07-06 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA EP written by United States. National Aeronautics and Space Administration and published by . This book was released on 1968 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology 1988 Catalog written by Rebecca J. Pardee and published by . This book was released on 1989 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the International Astronomical Union written by and published by CUP Archive. This book was released on with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1969 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
