Jacoby, Harold, 1865-1932 · New York, The Macmillan company · leaf 144
from these observed points S' through S, and continue them to certain other points E. We know that the sun is projected on the ecliptic circle at the points S' because the earth, in its orbital motion, occupies successively the points E. If we take S as the true position constantly occupied by the… … Fig. 3d. Sun s Angular Diameter. the relative distances of the various points E from S by a different kind of observation. This can be accomplished by measuring, with a suitable instrument, the Angular Diameter of the sun on the various dates when the positions S' were observed. To understand what…
Astronomy
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