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 209
s 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 io° and 300, 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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