Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 147
f the rotation determined What istheir general motion the same as? In what time does the sun complete a rotation ? ROTATION OF THE SUN ON ITS AXIS. that the sun rotates once on its axis in the space of 25days 7h. 48m. 244. This period is less than that of the revolution ofthe spots, and the reason… … PERIOD OF THE SUNS ROTATION. sun has been performing a revolution on its axis theearth has also been advancing in its orbit, and the easternmargin of the sun is now as many degrees and parts of adegree to the west of what was the eastern margin whenthe spot first appeared, as the earth has advanced…
Astronomy
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