An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 213
seeVenus at h ; and since AV and BV may be considered as equalto each other, as also V& and Va, therefore the triangles AVB andYah are similar to each other, and AV ; Ya :: AB : ah. But theratio of AV to Ya is known, (Art. 308) ; hence, the ratio of AB to » Now written Tahiti. 188 THE PLANETS.… … sun, is the suns horizontal parallax. To find the apparent diameteroi ah, we have only to find the breadth of the space between thetwo chords. Now, we can ascertain the value of each chord bythe time occupied in describing it, since the motions of Venus andthose of the sun are accurately known from…
Astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-325-217.webp)
