A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 273
e depicted in Fig. 125 (No. 1). The disc is about 3 indiameter, and exhibits a double luminous circle with two dark openings, Questions.—373. What are planetary nebulae ? a. What examples are given, andhow described ? 268 NEBULAE. each containing a bright but partially nebulous star. No. 2 in… … PLANETABY NEBULA. 1, IN TJBSA MAJOB , 2, IN ANDEOMEDA. b. The number of planetary nebulae discovered is about 25, three-fourths of which are in the southern hemisphere. Several described bySir John Herschel are of a blue color, in some cases with a tinge ofgreen. c. The size of these objects must…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
