List, C, Hall, T. G. (Thomas Grainger), 1803-1881 · Philadelphia : Thomas Cowperthwait & Co. and Carey & Hart · leaf 38
For, if the earth were at rest, and the planetmoved round it, then if the planet be at a, it wouldappear to be at a, when at b, at &, and when at c,at c, or to move always in the same direction a b c. The points ab c, are among the fixed stars,among which, when we look at the fceavens,… … In this figure, e is the earth, a e p its orbit ofan elliptic or oval shape, s the sun. a and p are the places at which the earth is atthe greatest and least distances from the sun: onthis account, a is called the aphelion, or from thesun; and p the perihelion, or near the sun. QUESTIONS. Why is it…
Astronomy
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