Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 192
suns atmosphere; but, when the spectro-scope is directed to the limb of the sun, displacements ofthe lines indicate horizontal motions in the suns atmos-phere. When a powerful spectroscope is directed to themargin of the suns disk, so that the slit of the collimatortube shall be perpendicular to… … 174 ASTRONOMY. is often widened and distorted in various ways, as shown inFig. 189. In the left-hand portion of the diagram, the lineis deflected towards the red end of the spectrum; thisindicates a violent wind on the suns surface blowing away from us. In the right-hand portion of the dia-gram,…
Astronomy
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