Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 404
Fig. 437- an immense star-cluster, so distant that the highest tele-scopic power cannot resolve it; yet in the largest telescopesit looks less resolvable, and more like a gas, than inthose of moderate size. If it is really a gas, and if the 378 ASTRONOMY. spectrum is continuous throughout the whole…
Astronomy
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