Wilkins, John H. (John Hubbard), 1794-1861 · Boston, Hilliard, Gray, Little, and Wilkins · leaf 108
from thecentre of the earth. Let S be the sun, BEH part of the orbit of Venus,and O the earth inits orbit. For thegreater advantage,let the transit be ob-served from a place,as _D, 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 _F,…
Astronomy
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