Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
gh the centre of theoval which represents the plane of the orbit of the earth, or the ecliptic;and the line E represents the axis of the ecliptic. The other dotted line in the figure passes through the centre of theoval Avhich represents the plane of the equinoctial. This plane passesthrough the… … 848. ObUquity of the ecliptic (Fig. 6).—The axis of theecliptic, E, and the axis of the equinoctial, A, form an angle of 23-|-degrees; hence, the plane of the ecliptic forms the same angle with tlieplane of the earths equator, or the equinoctial. This inclination ofthe ecliptic to the equator of…
Physics · Astronomy
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