ASTRONOMICAL PHOTOGRAPHY] MOUCHEZ, ERNEST BARTHELMY. La Photographie astronomique a L'Obervatoire de Paris et la carte du ciel . Paris: Gauthier-Villars, 1887. First edition. Elegant modern half morocco, marbled sides. 7 1/4 x 4 3/4 inches (18 x 12 cm); 107, [1] pp., with four superb mounted photographs with overlay keys taken by Paul and Prosper Henry, and three heliogravure plates, one folding. A sound, fresh copy, remarkably so given the woodpulp paper used for the text. Admiral Mouchez was the director of the Paris Observatory. The fine photographs here measure roughly 4 3/4 x 2 3/4 inches, and the tones are strong. His ambition was to create a photographic map of the visible sky, and to this end he had an equatorial telescope constructed with a 33 centimeter objective lens. The Henry brothers had recently completed an astrograph, and Mouchez adopted it for this epic undertaking, which took more than fifty years. The plates include a lunar view (the crater Eratosthenes) , the Hercules cluster, a time-lapse series of Jupiter images, showing the rotation of the red spot, and the last shows Saturn with its rings and Jupiter with its bands. C
ASTRONOMICAL PHOTOGRAPHY] MOUCHEZ, ERNEST BARTHELMY. La Photographie astronomique a L'Obervatoire de Paris et la carte du ciel . Paris: Gauthier-Villars, 1887. First edition. Elegant modern half morocco, marbled sides. 7 1/4 x 4 3/4 inches (18 x 12 cm); 107, [1] pp., with four superb mounted photographs with overlay keys taken by Paul and Prosper Henry, and three heliogravure plates, one folding. A sound, fresh copy, remarkably so given the woodpulp paper used for the text. Admiral Mouchez was the director of the Paris Observatory. The fine photographs here measure roughly 4 3/4 x 2 3/4 inches, and the tones are strong. His ambition was to create a photographic map of the visible sky, and to this end he had an equatorial telescope constructed with a 33 centimeter objective lens. The Henry brothers had recently completed an astrograph, and Mouchez adopted it for this epic undertaking, which took more than fifty years. The plates include a lunar view (the crater Eratosthenes) , the Hercules cluster, a time-lapse series of Jupiter images, showing the rotation of the red spot, and the last shows Saturn with its rings and Jupiter with its bands. C
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