Last Updated
：2025/11/30
vertical circle
（ plural ）
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(astronomy) A great circle on the celestial sphere, perpendicular to the horizon, that passes through the zenith and nadir
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vertical circle
When observing the altitude of a star, the astronomer measured its position along the vertical circle passing through the zenith.
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When observing the altitude of a star, the astronomer measured its position along the vertical circle passing through the zenith.
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