Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 320
nebulae 7 How classified ? 312 STARRY HEAVENS. classes; viz., Elliptical, Annular, Planetary,Double, Spiral, and Irregular Nebulje. 788. Elliptical Nebulae. One of the finest speci-mens of this class is situated in the girdle of Andromeda.It is visible to the naked eye, and was noticed and… … NEBULA OF ANDROMEDA. 789. Annular Nebulae. A remarkable annularnebula easily detected with a telescope of ordinary poweris found in the constellation of the Lyre. It has the ap-pearance of a flat oval ring, the central space not beingquite dark but appearing, says Herschel, to be filledwith faint…
Astronomy
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