Celestial scenery, or, The Wonders of the planetary system displayed : illustrating the perfections of deity and a plurality of worlds (1845)
Dick, Thomas, 1774-1857, Parker, E. S., former owner. DSI, David H. DeVorkin Collection (Smithsonian Institution. Libraries) DSI · Philadelphia : Published by Edward C. Biddle · leaf 97
e calculationsfounded on these observations, that the distance of the sun hasbeen very nearly ascertained, and the dimensions of theplanetary system determined to a near approximation to thetruth. It would be too tedious to enter into a particular ex-planation of the process and calculations… … the sun. Suppose two spectators, A and B, at opposite ex-tremities of that diameter of the earth which is perpendicularto the ecliptic; then, at the moment when the observer at Bsees the centre of the planet projected at D, the observer at Awill see it projected at C. If, then, the two observers…
Astronomy
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