zenith distance

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:
1695–1705
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Zenith distance is always a great word to know.
So is meteor. Does it mean:
a transient fiery streak in the sky produced by a meteoroid passing through the earth's atmosphere also called a shooting star or bolide
the movement or path of the earth or a heavenly body turning on its axis
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