Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 139
and it is in this position about June 21.The sun is at A, called the autumnal equinox, when the earthis at Ei, and it has this position about September 23. Finally,the sun is at W, which is called the winter solstice, when theearth is at Ei. The angle between the echptic and theequator at V and A… … no AN INTRODUCTION TO ASTRONOMY [ch. iii, 58 Suppose the observer is in north latitude 40°. Let 0,Fig. 43, represent his position, and suppose his horizon isSWNE, where the letters stand for the four cardinal points.Then it follows from the relation of the altitude of the pole to the latitude of…
Astronomy
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