Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 47
ies of Copernican System.—The Copernicansystem presented several difficulties. How the Mooncould be carried round the Sun with the Earth is amechanical problem which was not at that time d 2 36 ASTRONOMY soluble. Another objection arose from the absenceof any appreciable motion of the fixed stars.… … Diag. XX. Saturn. If the Earth described a circle round theSun, its positions when on opposite sides are a verygreat distance apart. It was to be expected that thestars, seen from two points so far apart, would showsome differences of relative position. The only replywhich could be given—and it is…
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-35-14.webp)
