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zenith distance

noun, Astronomy
the angular distance from the zenith of a point on the celestial sphere to the sphere, measured along a great circle that is perpendicular to the horizon; the complement of the altitude.
Origin of zenith distance
1695-1705 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for zenith distance
  • Z is the solar zenith distance expressed in degrees.

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