Winchell, Alexander, 1824-1891 · Chicago, S.C. Griggs and company · leaf 71
e thefollowing classes : *It is impossible to say whether the apparently continuous spectra of someof these nebulie are crossed or not by darlc lines. 42 COSMIC A L DUST. 1. Amorphous Nebulm.— Here we may include thegreat nebula in the sword-handle of Orion.* I reproducefor the reader (Figure 6)… … FiG. 6. The Great Nebula in Orion. Central Part. Drawn by L.Trouvelot. ber of bright lines. Here belong also, the two MagellanicClouds, visible to the naked ej^e in the southern hemi-sphere. I am not aware that their spectrum has beenobtained. 2. Spiral NehulcB.—T\\Q nebula No. 3,239 Herschel *…
Nebular hypothesis · Cosmogony
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