Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 84
motionin this orbit. The sizeof the orbit—its scale ofmiles — cannot be fixeduntil we find the sunsdistance. 116. To find the Formof the Orbit, we proceedthus: Take a point, 8,for the sun, and drawthrough it a line, S°f (Fig. 21), directed towards the vernal equi-nox, from which longitudes are… … Fig. 21.Determination of the Form of the Earths Orbit. §116] DEFINITIONS OF ORBITAL ELLIPSE. 71 when observations were made. We shall thus get a sort of spider, showing the direction of the earth as seen from thesun on each of those days. Next as to the distances. While the apparent diameter ofthe…
Astronomy · Constellations
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