...sun appears to describe on the celestial sphere with the earth as a centre in the course of a year. The plane of the ecliptic is inclined to the plane of the equator at an angle (called the obliquity) of about 23° 27', but is subjected to a diminution of about 5" in a century....

...(2) the effects of thenaction, (3) circumstances by which their force is increased or modified. 2. " The plane of the ecliptic is inclined to the plane of the equator at an angle of 23 J degrees." Explain carefully what is meant by this, and what results arise from it. 3. Give an...

...representing the path in which the sun appears to move by reason of the annual revolution of the earth. The plane of the ecliptic is inclined to the plane of the celestial equator at an angle of about 23° 27'. p. Equinoxes are the two points where the ecliptic...