Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 122
metrical tables. Bearing in mind these facts wewill proceed to the second part of the explanation. 196. In Fig. 38, S represents the centre of the sun, Ethat of the earth, SL is a line supposed to be drawn fromthe centre of the sun, touching the earth at L, andnecessarily at right angles to the… … suns distance measured. earth and sun. SLE, therefore, constitutes a right an-gled triangle, and the angle LSE is the average horizon-tal parallax of the sun, equal to 8 6. 197. Now we know the length of the line LE, whichis half the earths diameter, to be 3,956 miles, and as wehave the value of…
Astronomy
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