Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 45
n. In Dia-gram XIX, if Venus is at Vwhen the Earth is at E,looking at the Sun from E,Venus would appear on theleft hand, while if the Earthreaches E; when Venusreaches V7, it will be seeniag* on the right hand. Thus Venus will be alternately a morning and evening star,and can never be more than a… … THE COPERNICAN SYSTEM 35 tances of the planets from the Sun could be obtained.As Mercury never gets so far from the Sun as Venus,it must describe a smaller circle; the knowledge ofthe greatest angle its direction can make with thatof the Sun makes it possible to draw this circle toscale with the…
Astronomy
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