Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 449
nely detailed struc-ture resembles the Orion nebula. The coronal streamers often, perhaps generally, havetheir bases in the regions of active prominences, but excep-tions have been noted. That they are in some way con-nected with activity on the sun is shown by the fact that-theform qf the corona… … CH. XI, 238] , THE SUN 403 equally. As the maxima pass, the coronal streamers grad-ually withdraw from the poles of the sun and extend out togreater distances in the sun-spot zones. At the sun-spotminima, the corona consists of short rays in the polar regions,curved away from the solar axis, and…
Astronomy
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