Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 135
is called the ecliptic. In 106 AN INTRODUCTION TO ASTRONOMY [ch. hi, 55 Fig. 39 it is the circle RARV. The plane of the earthsequator cuts the sky in a circle which is called the celestialequator. In the figure it is QAQV. The angle between theplane of the equator and the plane of the ecliptic is… … Fig. 39. — The ecliptic, celestial equator, and celestial pole. and the point where the earths axis, extended, pierces thesky is called the pole of the equator or, simply, the celestialpole. The orbit of the earth is so very small in comparisonwith the distance to the sky that the motion of the…
Astronomy
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