A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 22
The Axis of a sphere isthe line, real or imaginary,around which it revolves. AXIS OF A SPHERE. AXIS … The Poles of a sphereare the extremities of itsaxis, or the points wherethe axis cuts the two op-posite surfaces. The Equator of a sphere is an imaginary circle uponits surface, midway between its poles, the plane of whichcuts the axis perpendicularly, and divides the sphereinto two equal parts or…
Astronomy
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