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The scientific papers of William Parsons, third earl of Rosse, 1800-1867 / collected and republished by the Hon. Sir Charles Parsons.

The realm of the nebulae.

Sternhaufen und Nebel Teil 1. Wolfgang Meyer

The stellar heavens. An introduction to the study of the stars and nebulµæ by J. Ellard Gore ...

On the excitation of interstellar ammonia in the Kleinmann-Low nebula / by James S. Sweitzer.

Galactic Wolf-Rayet ring nebulae in the northern hemisphere / by Grant Joseph Miller.

Photographs of nebulae and clusters made with the Crossley reflector / by James Edward Keeler, director of the Lick observatory, 1898-1900.

The expanding universe / by Sir Arthur Eddington.

Soviet science of interstellar space. [Russian text edited by V.G. Fesenkov. Translated from the Russian by Mary Zirin].

The realm of the nebulæ / by Edwin Hubble.

Views of the architecture of the heavens : in a series of letters to a lady / by J.P. Nichol.

Observations upon the great nebula of Orion / by the late George Phillips Bond, A.M., director of the Observatory of Harvard college. Ed. by Truman Henry Safford, A.B., director of the Dearborn observatory of Chicago.

The architecture of the heavens / by J.P. Nichol.

An atlas of representative stellar spectra from 4870 to 3300 : together with a discussion of the evolutional order of the stars, and the interpretation of their spectra / Preceded by a short history of the observatory and its work, by Sir William Huggins ... and Lady Huggins.

Further observations on the spectra of some of the nebulae : with a mode of determining the brightness of these bodies / William Huggins.