Right sphere

(Astron. & Geol.)

a sphere in such a position that the equator cuts the horizon at right angles; in spherical projections, that position of the sphere in which the primitive plane coincides with the plane of the equator.- Ham. Nav. Encyc.

right sphere

[′rīt ′sfir] (astronomy) The appearance of the celestial sphere as seen by an observer at the earth's equator.

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