A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 22
A Sphere is a globe or loll, everypart of the surface of which is equidis-tant from a point within, called itscenter. This isthe ordinary definition; but in Astronomy, the termis applied to the apparent concave of the heavens, as if it werethe actual concave surface of a hollow sphere. … dicular ? Inclined ? What is meant by the angle of inclination I The areaof a plane surface ? Describe a convex surface—a concave. 15. Describe a sphere—hemisphere—spheroid. (Derivation of spheroid?) 18 ASTRONOMY. A HEMISPH ER
Astronomy
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