Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Rees Orme · leaf 201
vely motionless centre about which the earthperforms an annual elliptic orbit of the dimensions andexcentricity, and with a velocity regulated according tothe law above assigned; the sun occupying one of thefoci of the ellipse, and from that station quietly disse-minating on all sides its light and… … * See Cab Cyc. Mechanics, Centre of Gravity. CHAP. V. EXPLANATION OF THE SEASONS. }Q5 (309.) In this annual motion of the earth, its axispreserves, at all times, the same direction as if theorbitual movement had no existence; and is carriedround parallel to itself, and pointing always to thesame…
Astronomy
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