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 215
due to very bright vapors floating over thespot. 194 ASTRONOMY. At times, also, the spectrum of a spot indicates violentmotion in the overlying gases by distortion and displacementof the lines. This phenomenon occurs oftener at points near the outer edge of the penum-bra than over the centre ofthe… … Fig. 212. neighbor is not disturbed in the least, showing that thevapors which produce the lines are at different levels in thesolar atmosphere, and moving independently of each other. 192. The Cause and Nature of Sun-Spots. — According toProfessor Young,the arrangementand relations ofthe…
Astronomy
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