Photographs of Stars, Star-Clusters and Nebulae: Together with Information Concerning the Instruments and the Methods Employed in the Pursuit of Celestial Photography

Isaac Roberts

doi:10.1017/CBO9780511659102

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Photographs of Stars, Star-Clusters and Nebulae

Photographs of Stars, Star-Clusters and Nebulae

Together with Information Concerning the Instruments and the Methods Employed in the Pursuit of Celestial Photography

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Volume 1
Isaac Roberts

Publisher:: Cambridge University Press
Online publication date:: November 2015
Print publication year:: 2010
First published in:: 1893
Online ISBN:: 9780511659102
DOI:: https://doi.org/10.1017/CBO9780511659102

Subjects:: Physics and Astronomy, Cosmology, Relativity and Gravitation, Astronomy: General Interest
Series:: Cambridge Library Collection - Astronomy

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A geologist and fellow of the Royal Astronomical Society, Isaac Roberts (1829–1904) made significant contributions to the photography of star-clusters and nebulae. By championing reflecting rather than refracting telescopes, Roberts was able to perceive previously unnoticed star-clusters, and was the first to identify the spiral shape of the Great Andromeda Nebula. Roberts' use of a telescope for photographing stars, and a long exposure time, provided greater definition of stellar phenomena than previously used hand-drawings. Although Roberts' conclusions about the nature of the nebulae he photographed were not always correct, the book is significant for the possibilities it suggests for nebular photography. Published in London in 1893 and 1899, the two-volume Photographs of Stars represents the summation of his work with his assistant W. S. Franks at his observatory in Crowborough, Sussex. Volume 1 contains 51 collotype plates of stars, and descriptions of his instruments and methods.

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Photographs of Stars, Star-Clusters and Nebulae

Together with Information Concerning the Instruments and the Methods Employed in the Pursuit of Celestial Photography

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Frontmatter
pp i-iv

SELECTION OF PHOTOGRAPHS OF STARS, STAR-CLUSTERS AND NEBULÆ TOGETHER WITH INFORMATION CONCERNING THE INSTRUMENTS AND THE METHODS EMPLOYED IN THE PURSUIT OF CELESTIAL PHOTOGRAPHY
pp 1-2

PREFACE
pp 3-3

ISAAC ROBERTS' OBSERVATORY, CROWBOROUGH HILL
pp 4-5

ISAAC ROBERTS' TELESCOPES
pp 6-8

Contents
pp 9-10

LIST OF THE PLATES
pp 11-12

LIST OF THE ABBREVIATIONS
pp 13-13

THE NEGATIVES
pp 13-13

ARRANGEMENT OF THE PHOTOGRAPHS
pp 13-14

EPOCH OF THE FIDUCIAL STARS (A.D. 1900)
pp 15-15

A TABLE FOR CONVERTING MEASUREMENTS IN RIGHT ASCENSIONS INTO INTERVALS OF TIME
pp 16-18

ILLUSTRATIONS OF THE METHOD FOR DETERMINING THE RIGHT ASCENSIONS AND DECLINATIONS OF THE STARS
pp 19-20

INTRODUCTION
pp 21-23

UTILITY OF THE PHOTOGRAPHIC CHARTS
pp 23-24

REFRACTORS AND REFLECTORS AS PHOTO-INSTRUMENTS
pp 25-25

REQUIREMENTS AND ADJUSTMENTS OF A REFLECTOR FOR CELESTIAL PHOTOGRAPHY
pp 25-26

COLLIMATION OF THE MIRROR
pp 27-28

ESSENTIALS OF A PHOTO-TELESCOPE
pp 28-29

METHOD FOR TESTING THE STABILITY OF A PHOTO-INSTRUMENT
pp 29-29

PHOTOGRAPHIC PLATES: THEIR EXPOSURES AND DEVELOPMENT
pp 30-30

DESCRIPTION OF THE PHOTOGRAPHS AND REFERENCES CONCERNING THEM: Pages 31-61
pp 31-61

DESCRIPTION OF THE PHOTOGRAPHS AND REFERENCES CONCERNING THEM: Pages 62-95
pp 62-95

DESCRIPTION OF THE PHOTOGRAPHS AND REFERENCES CONCERNING THEM: Pages 96-132
pp 96-132

DEDUCTIONS FROM THE PHOTOGRAPHS
pp 133-134

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Photographs of Stars, Star-Clusters and Nebulae

Together with Information Concerning the Instruments and the Methods Employed in the Pursuit of Celestial Photography

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