Sharpless, Isaac, 1848-1920, Philips, G. M. (George Morris), 1851-1920, joint author · Philadelphia, J.B. Lippincott company · leaf 45
The earthsaxis is not perpendicular to the plane in which the sunmoves, but is inclined to it. The angle between theecliptic and the equator is 23J degrees. Fig. 9 showsthis leaning of the earths axis. SS is the ecliptic. … Fig. 9.—The Ecliptic. EQ is the equator. The plane of the ecliptic cuts theearth along TT. The angle EVT is the angle of23J degrees. When the sun is at S it is directly overT, which is 23J degrees south of the equator. This isthe winter solstice ;2 it comes on the 21st of December.This is the…
Astronomy
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