Wilkins, John H. (John Hubbard), 1794-1861, Duke University. Library. Jantz Collection. German Americana · Boston : Hilliard, Gray and Co. · leaf 106
om thecentre of the earth. Let S be the sun, BEH part of the orbit of Venus,nnd O the earth in*»,s orbit. For tliegreater advantage,let the transit be ob-served from a place,as jD, where thesun will be on themeridian about themiddle of the tran-sit. Let us supposethat Venus at B isseen at D as… … Phenomena arising from Magnitude, 85 pass off the suns disk at C; the time of doing which,let us suppose to be the same as the calculated dura-tion of the transit as seen from the earths centre. Butduring this time, by the rotation of the earth on its axis,the place D is carried eastward to P,…
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-311-203.webp)
