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 225
MY. miles ; but occasionally they rise far higher than even thelargest of the quiescent protuberances. Their spectrum isvery complicated, especially near their base, and often filledwith bright lines. The most conspicuous lines are those ofsodium, magnesium, barium, iron, and titanium: henceSecchi… … Fig. 220. Sometimes, in the course of fifteen or twenty minutes, amass of these flames, fifty thousand miles high, will undergoa total transformation ; and in some instances their com-plete development or disappearance takes no longer time.Sometimes they consist of pointed rays, diverging in…
Astronomy
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