Mattison, Hiram, 1811-1868 · New York, Huntington and Savage, Mason and Law · leaf 155
a synodic revolution. It con-sists of one complete revolution of the Sun upon his axis, and about 27° over.] 70§. Where are these Spots situated ? They are usually on each side of the Suns equator, and within a zone of 60°. 709. How is the Suns Axis situated with respect to the Ecliptic 1It is… … March. June. September. [1. Let E F represent the plane of the ecliptic. In March the spots describe a curve,which is convex to the south, as shown at A. In June they cross the Suns disk innearly straight lines, but incline upward. In September they curve again, though inthe opposite direction; and…
Astronomy
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