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 409
Fig. 444. smaller ones, requiring a nine-inch telescope to be well seen.Besides these, the whole nebula is dotted with stars. ASTRONOMY. 383 In the winter of 1864-65 the spectrum of this nebulawas examined independently by Secchi and Huggins, whofound that it consisted of three bright lines, and…
Astronomy
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