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Oblate spheroid
Prolate spheroid
oblate spheroid prolate spheroid

A spheroid is an ellipsoid.[1] It is got by rotating an ellipse about one of its principal axes. This means it is an ellipsoid with two equal semi-diameters.

Most celestial objects are oblate spheroids. They usually spin, and as they spin, centrifugal force pulls them into that shape. Few natural objects are prolate spheroids.

Related pages[change | change source]

Notes[change | change source]

  1. In mathematics, ellipsoids are quadrics or quadric surfaces.