A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 28
ECCENTRICITY OF AN ELLIPSE. … An Ellipse is an oblong figurelike an oblique view of a circle,having two points called its foci,around which, as centers, the figureis described. Foci is the plural of focus. The longer diameter of an ellipseis called its Major Axis, and theshorter its Minor Axis. Axes is the plural of axis. The…
Astronomy
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