vertical circle


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vertical circle

n.

vertical circle

n
(Astronomy) astronomy a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon

ver′tical cir′cle



n.
a great circle on the celestial sphere passing through the zenith.
[1550–60]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vertical circle - a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon
great circle - a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center
References in periodicals archive ?
From Blackstone Point near Arnside, people will be able to see the amazing sight of an apparently vertical circle that reflects the colour of the changing sky.
5-meter vertical circle, a position-measuring instrument that he had commissioned for his observatory in Palermo, Sicily.
When it is moving through a wide arc, suddenly swing it rapidly in a vertical circle several times.
According to the description of Biot (1821), this goniometer consists of a vertical circle with a horizontal mirrored glass in its center [ILLUSTRATION FOR FIGURE 26 OMITTED].
Of all surviving goniometers the most common and widespread type is that with a vertical circle and mirror.
The techniques and principles of measurements are independent of the position of the circle; however, vertical circle instruments have the following faults:
1) A crystal mounted in wax on a vertical circle can, through its own weight, move out of position, and therefore only small crystals are suitable for measurement.
The measurement principles of the goniometer constructed by Eilhard Mitscherlich (1794-1863) [ILLUSTRATION FOR FIGURE 52 OMITTED] are the same as those of Malus; however, the telescope is directed at the horizontal axis of the vertical circle.
From the north, the center's stainless steel walls are a series of vertical circle segments.

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