Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 138
level, and in-tensified in brightness. 124 SUN SPOTS. [§184 Fig. 47 shows faculse around a spot near the suns limb.The photosphere is probably a sheet of clouds floating in aless luminous atmosphere, just as a cloud formed by the con-densation of water-vapor floats in the air. It is… … Fig. 47. — Faculse at Edge of the Sun. (De La Rue.) 185. Sun Spots. — Sun spots, whenever visible, are the mostconspicuous and interesting objects upon the solar surface.The appearance of a normal sun spot, Fig. 48, fully formed,and not yet beginning to break up, is that of a dark centralumbra,…
Astronomy · Constellations
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