Fr. 48.90

Photographs of Stars, Star-Clusters and Nebulae - Together With Information Concerning Instruments Methods Employed in

English · Paperback / Softback

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Klappentext Published between 1893 and 1899, this two-volume work illustrates the research of a pioneer of modern astronomy. Zusammenfassung A fellow of the Royal Astronomical Society and a pioneer in modern astronomy! Isaac Roberts made significant advances in the field of stellar photography. This first volume of Photographs of Stars! published in London in 1893! contains 51 collotype plates of stars! and descriptions of his instruments and methods. Inhaltsverzeichnis Preface; Isaac Roberts' observatory, Crowborough Hill; Isaac Roberts' telescopes; List of the plates; List of the abbreviations; 1. The negatives; 2. Arrangement of the photographs; 3. Epoch of the Fiducial stars (A.D. 1900); 4. A table for converting measurements in right ascensions into intervals of time; 5. Illustrations of the method for determining the right ascensions and declinations of the stars; 6. Introduction; Utility of the photographic charts; 7. Refractors and reflectors as photo-instruments; 8. Requirements and adjustments of a reflector for celestial photography; 9. Collimation of the mirror; 10. Essentials of a photo-telescope; 11. Method for testing the stability of a photo-instrument; 12. Photographic plates: their exposures and development; 13. Description of the photographs and references concerning them; 14. Deductions from the photographs.

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