A New General Catalogue of Nebulae and Clusters of Stars, Being the Catalogue of the Late Sir John F. W. Herschel

ISBN: 9781332967988 出版年：2016 页码：240 John Frederick William Herschel J L E Dreyer Forgotten Books

In the case of form, the scale was supposed arranged in the order: round, very little extended, elliptic or oval, considerably extended, pretty much extended, much extended, very much extended, extremely extended.