Brennan, Martin Stanislaus, 1845-1927 · New York : The Catholic publication society co. · leaf 57
ht willow-leaves. When the Sun is viewed with a telescope of evenmoderate size its bright granular surface is seen to bepitted with black spots. These spots are occasionallyvery numerous. They vary in number and size from 4s Astronoxiy: New and Old. time to time. They are observed to have a… … Fig. 4.—Su>T Spots. feature of the Suns rotation is that it does not turnlike the earth all-of-a-piece. but some parts move faster,and, indeed, make more turns, than others. This is astrong argument against the Suns solidity. The equa- The Sex. 49 torial regions revolve in a shorter time than do…
Astronomy
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