Giberne, Agnes, 1845- [from old catalog] · Cincinnati, National book company · leaf 140
he fact that, as thespots move across the sun, the changes which regu-larly take place in their appearance make it prettyclear that their shape is not flat, but hollow and cave-like. The changes here spoken of are seemingchanges of shape, caused by change of position. MORE ABOUT THE SUN. 135 There… … A TYPICAL SUN-SPOT. fortnight hidden on the other side, still they are farfrom being fixed in form. The alterations are at times not only very great,but very rapid. Sometimes in a single hour of watch-ing, an astronomer can see marked movement going 136 STORY OF THE SUN, MOON, AND STARS. on—as you…
Astronomy
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