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zenith tube
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zenith tube
noun Astronomy.
a telescope mounted to point only at the zenith, used at some observatories for measuring time by the stars.
Also called zenith telescope.
Origin:
1830–40
1830–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Zenith tube
is always a great word to know.
So is sidereal. Does it mean:
| the angular distance of a heavenly body above the horizon |
| determined by or pertaining to the stars |
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