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 277
the immensity of their extent and the diversityof objects which they present, they are only comparable to that ap-parently greatest of all clusters, the Milky Way. 377. Double Nebula are those which indicate by theirclose proximity to each other that they have a physicalconnection. More than 50 of… … DOTTKLE NEBULA.—Lord RotfSe Struve, DArrest, Hind, terminated by brilliant ap-pendages and enveloped in anebulous mass, the whole sur-rounded by light luminousares resembling fragments of anebulous ring. 378. Vakiable Neb-ula are those which un-dergo changes in appar-ent form and brightness.a.…
Astronomy
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