Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 64
ative between July 1 and January 1and positive between January 1 and July 1 (see Fig. 23). Secondly, we will neglect the eccentricity of the Earthsorbit but take into account the obliquity of the ecliptic. Wetherefore suppose the Sun to move in the ecliptic but withuniform angular velocity, the… … Fig. 21.—To illustrate the Effectof the Obliquity of the Ecliptic. 52 GENERAL ASTRONOMY respectively will be equal. If PSQ be the declination circlethrough the true Sun S (Fig. 21), meeting the equator in Q, andif Si be the position of the mean Sun, the angle S^PQ betweenthe declination circles…
Astronomy
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