Stars and telescopes; a hand-book of popular astronomy, founded on the 9th ed. of Lynn's Celestial motions (1899)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911. Celestial motions · Boston, Little, Brown and company · leaf 95
ace.17 In theirimmediate neighborhood there are often to be seenpatches of more than usual brightness (heapings up,so to speak, of luminous matter), which are calledfaculce, the Latin word for torches. Both phenomenaindicate activity and commotion in the outer part(and to some unknown depth below)… … SUN SPOT HIGHLY MAGNIFIED (SECCHl) {Observe that the Penumbra is darker nearerits outer edge) group of spots as they transit the apparent face of the S^n.Above is a characteristic sun-spot, from a drawing with muchdetail, by Secchi. Also, the opposite illustration indicatesthe regions of greatest…
Astronomy
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