The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 215
ions of the photospheric clouds in the neighborhood of a spot are such as are represented in Fig. 213. • Over the suns surface generally, these clouds probably have the form of vertical columns, as at a a. Just outside the spot, the level of the photosphere is the most part, overtopped by… … ASTRONOMY. , I95 sun, these spiky, vivid outbursts of metallic vapors seldomoccur except just in the neighborhood of a spot, and then onlyduring its season of rapid change. In the penumbra of thespot the photospheric filaments become more or less nearlyhorizontal, as at pp; in the umbra at u it is…
Astronomy
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