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 168
Spiral Nebula in Ursa Major (M 101) Photographed at the Lick Observatory by J. E. Keeler, with the Crossleyreflector. Exposure four hours.Note the appearance of swift revolution, as if the nebula were throwingitself to pieces like a spinning pin-wheel. … The Whirlpool Nebula in Canes Venatici Photographed at the Lick Observatory by J. E. Keeler, with the Crossley reflector. Exposure four hours. Note the beading of the arms of the whirling nebula. PART III. THE SOLAR SYSTEM. 125 PART III. THE SOLAR SYSTEM. i. The Sun. By the term solar systemis…
Astronomy
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