An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 284
deserving of all praise; the latter of less confidence.Changes, however, are going on in some of the nebulas, which * Phil. Trans. 1811. NEBULA. 259 plainly show that they are not, like planets and stars, fixed andpermanent creations. Thus the great nebula in the girdle of An-dromeda, has very much… … pearance of a rapid increase of numbers toM^ards the center, (Fig.72, b) the exterior boundary being irregular, and the central partsmore nearly spherical. 416. The Nebula in the sword of Orion is particularly celebrated,being very large and of a peculiarly interesting appearance. Ac-cording to Sir…
Astronomy
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
