Wilkins, John H. (John Hubbard), 1794-1861, Duke University. Library. Jantz Collection. German Americana · Boston : Hilliard, Gray and Co. · leaf 28
earances or phases, which themoon does, and they are to be accounted for in thesame manner. Of this we shall treat hereafter. 18. The distance of Mercury from the sun is to thatof the earth nearly as 3 to 8. Therefore the degree ofheat and light at Mercury is to that at the Earth, nearlyas (8 X 8)… … Of Venus. 21 Sect. 4. Of Venus. 19 Next to Mercury, in the Solar system, is Venus.This planet revolves round the sun at the mean dis-tance of 68 millions of miles. It completes its revolu-tion in about 7^ months; an& turns on its axis in littleless than 24 hours. The light reflected by this…
Astronomy
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