Is It a Fact That the Sun Revolves on Its Axis?
It is a proved fact that the sun revolves on its axis. All parts of its surface, however, do not rotate with the same velocity. The rotation of the sun differs from that of the earth in this respect.
This constitutes the visible proof that the physical state of the sun is different from the earth’s, although they are composed of similar chemical elements.
The earth, being covered with a solid crust, and being also, as recent investigation demonstrates, as rigid as steel throughout its entire globe, rotates with one and the same angular velocity from the equator to the poles.
If you stood on the earth’s equator you would be carried by its daily rotation round a circle about 25,000 miles in circumference. If you stood within a yard of the North or South Pole you would be carried, by the same motion, round a circle not quite 19 feet in circumference. And yet it would require precisely the same time, viz., twenty-four hours, to describe the 19-foot circle as the 25,000-mile one.