Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 133
near the Suns edge.The spectroscope shows that these faculae are asso-ciated with glowing calcium vapour. When a photo-graph (of the Sun) is taken in K light, a picture isobtained of the calcium clouds over the photosphere.Such photographs were found to show more than thefaculse, and the name… … Diag. LX.—Calcium Flocculi. The structure of the Sun is thus seen to be ex-tremely complicated. The lowest part emits a con-tinuous spectrum; this passes through an absorbinglayer which gives the dark Fraunhofer lines. Nextthere is a dusky layer which cuts off a great deal ofthe light, the…
Astronomy
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