The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 209
les per hour than therest of the solar surface, but they complete the entire rota-tion in shorter time. There appears tobe a peculiar surface-drift in the equatorialregions of the sun,the cause of whichis unknown, but whichgives the _ spots aproper motion; thatis, a motion of theirown, independent… … ASTRONOMY. 189 tween the latitudes of 10° and 30°, as shown in Fig. 203.On and near the equator itself they are comparatively rare.There are still fewer beyond 35° of latitude, and only asingle spot has ever been recorded more than 45° from thesolar equator. Fig. 204 shows the distribution ofthe…
Astronomy
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