Astronomy in a nutshell, the chief facts and principles explained in popular language for the general reader and for schools (1912)
Serviss, Garrett Putman, 1851-1929, Rouben Mamoulian Collection (Library of Congress) DLC · New York, London, G.P. Putnam's sons · leaf 204
Spiral Nebula in Cepheus (H IV 76) Photographed at the Lick Observatory by J. E. Keeler, with the Crossley reflector. Exposure four hours. Observe that the central portion is only of stellar magnitude. … Nebulous Groundwork in Taurus Photographed at the Yerkes Observatory by E. E. Barnard with io-inehBruce telescope. Exposure six hours twenty-eight minutes.Prof. Barnard has suggested that some of these dark lanes in rich regionsnf stars are non-luminous nebulae. The Moon 155 of the mountains of the…
Astronomy
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