The celestial sphere is finite and spherical.
Heliocentric model of the solar system
From 'De Revolutionibus Orbium Coelestium', Book I, Chapter 1
1543
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"The Sun, the Moon, and the Earth, are all parts of one great system."
Strange & Unusual"Nations are not ruined by one act of violence, but gradually and in an almost imperceptible manner by the depreciation of their circulating currency, through its excessive quantity."
Strange & Unusual"For I am convinced that the world is a single, unified system, and that all its parts are interrelated."
Strange & Unusual"The movements of the heavens are an ordered dance, and the Earth is a participant in this dance."
Strange & Unusual"And so, having obtained the opportunity, I now propose to explain the motions of the heavenly bodies, and the order of the universe, with greater certainty than has hitherto been possible."
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