 | William Nicholson - 1809 - 684 sider
...the plane of a circle, and in a line, called the axis, passing perpendicularly through the centre. The zenith and nadir are the poles of the * horizon ; and the poles of the equator are the same with those of the sphere. POLES of the ecliptic, are two points on the surface... | |
 | William Nicholson - 1821 - 376 sider
...the plane of a circle, and in a line, called the axis, passing perpendicularly through the centre. The zenith and nadir are the poles of the horizon ; and the poles of the equator are the same with those of the sphere. POLES of the ecliptic, ate two points on the surface... | |
 | James Mitchell - 1823 - 666 sider
...the plane of a circle, and in a line, called the axis, passing perpendicularly through tl*e cenitre. The zenith and nadir are the poles of the horizon ; and the poles ,a( the equator are the same with Ihose of the sphere. POLES of the Ecliptic, are two points on the... | |
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POLE, in spherics, a point equally distant from every part of the circumference of a great circle of the sphere, as the centre is a plane figure ; or it is a point of ninety degrees distant from the plane of a circle, and in a line, called the axis, passing... 