The geography of the heavens and classbook of astronomy; (1863)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Whitall, Henry, 1819-1887? Celestial planisphere. [from old catalog] · New York, Mason brothers; Boston, Mason & Hamlin; [etc., etc.] · leaf 176
move upward, as they cross from east to west, while atother times they incline downward, while the curve lines aresometimes convex towards one pole of the Sun, and sometimestowards the other. 333. All these phenomena are owing to the fact that the axisof the Sun is inclined to the ecliptic, so that… … March. Jattt. September. December. 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 disc in nearlystraight lines, but incline upward. In September, they curve again, though in the oppo-site…
Constellations · Stars
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