# circle of latitude

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## circle of latitude

(astronomy)
A great circle of the celestial sphere passing through the ecliptic poles, and hence perpendicular to the plane of the ecliptic. Also known as parallel of latitude.
(geodesy)
A meridian of the terrestrial sphere along which latitude is measured.

## circle of latitude

i. A great circle of the celestial sphere through the ecliptic poles and, hence, perpendicular to the plane of the ecliptic.
ii. A meridian along which latitude is measured.
References in periodicals archive ?
They should see that the longitudinal angle is the same across all parallels of latitude and thus the coordinates depend on the radius of the circle of latitude of that point, which is already known from a previous activity.
bar] from the origin to the center H of the circle of latitude [[theta].
In Figure 5, we show the circle of latitude [[theta].
S], 0) (say), relative to a new right-handed coordinate system x'y'z' where x' and y' lie in the plane P containing the circle of latitude [[theta].
With a model such as this you now have some possibility of leading your young students to realise that the radius of the 30 degree south circle of latitude equals R cos 30.
r = R cos x = radius of the circle of latitude x[degrees]N or S, where R = radius of the earth;

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